Railroad performance under the Staggers Act: deregulation revived the rail freight industry, with most of the gains going to shippers.
Eakin, B. Kelly ; Bozzo, A. Thomas ; Meitzen, Mark E. 等
On October 14, 1980, President Jimmy Carter signed the Staggers Act
into law. In his accompanying Statement of Signing, President Carter
wrote:
By stripping away needless and costly regulation in favor of
marketplace forces wherever possible, this act will help assure a
strong and healthy future for our Nation's railroads and the men
and women who work for them. It will benefit shippers throughout
the country by encouraging railroads to improve their equipment and
better tailor their service to shipper needs. America's consumers
will benefit, for rather than face the prospect of continuing
deterioration of rail freight service, consumers can be assured of
improved railroads delivering their goods with dispatch.
This was a statement of promise and potential. Thirty years have
passed since the Staggers Act was signed and we can now take a fairly
long measure of how well it has lived up to its promise. We can also
venture some guesses as to what is in store for U.S. railroads and their
shippers in the first half of the new century.
How We Got to Staggers
The Staggers Act was the culmination of a wave of reform in the
U.S. railroad industry, and was the last of several pieces of
legislation that largely deregulated the transportation sector of the
U.S. economy. For decades prior to the Staggers Act, the railroads had
been struggling for survival. In the 1940s and 1950s it became apparent
that regulation had become a major factor in the railroad
industry's ailments, but it was not until the 1970s that meaningful
reform began to take shape in response to the extremely critical
financial condition of the industry.
By 1970, several large freight railroads in the Northeast faced
bankruptcy. Concerns about the railroads' situation led to the
passage of the Regional Rail Reorganization Act of 1973. Under the
legislation, the failing Northeast railroads were reorganized under
federal control and became Consolidated Rail Corporation, better known
as Conrail. Conrail was sold back into the private sector in 1987 and
then broken up and absorbed into CSX and Norfolk Southern in the late
1990s.
Continued financial problems for railroads outside the Northeast
resulted in the passage of the Railroad Revitalization and Regulatory
Reform Act of 1976. The legislation allowed railroads flexibility in
setting rates. In particular, it set the stage for the deregulation of
rates by allowing railroads the freedom to set rates for traffic where
there was competition.
Airlines and trucking were also being deregulated during this
period. Airline deregulation, an objective of the Nixon, Ford, and
Carter administrations, was achieved with the Airline Deregulation Act of 1978. The legislation called for elimination of regulatory
restrictions on domestic routes and services within three years, and
complete deregulation of domestic fares within five years. The Civil
Aeronautics Board officially went out of existence on January 1, 1985;
however, the bipartisan consensus in favor of deregulation and Alfred
Kahn's leadership of the CAB led to effective deregulation of
airlines well before that deadline.
On July 1, 1980, the Motor Carrier Act of 1980 was signed into law
by President Carter, deregulating trucking. The Motor Carrier Act
eliminated most restrictions on entry, commodities carried, routes, and
geographic zones. The Interstate Commerce Commission, under the
leadership of Darius Gaskins, interpreted the act as largely removing
the trucking industry from regulatory oversight.
Thus, the Staggers Act was much more the crescendo of
transportation industry deregulation, rather than a watershed event.
Nevertheless, the legislation has become the marker of rail
deregulation. But unlike the airline and trucking deregulation acts, the
Staggers Act only partially deregulated the freight railroad industry.
The act provided the railroads with a high level of freedom in setting
rates, gave the railroads the right to negotiate private contracts with
shippers, and made it easier for railroads to abandon unprofitable
lines. However, two features distinguish the Staggers Act from the
airline and trucking deregulation acts: First, the legislation makes
explicit the goal of a financially stable industry. Second, the act
maintains a regulatory backstop, as shippers can appeal for
route/shipment-specific rate relief if, for that route/shipment,
revenues are more than 180 percent of variable cost and the shipper does
not have another railroad or alternative transportation mode for that
shipment.
Only one major piece of rail legislation has been enacted since the
Staggers Act. The ICC Termination Act of 1995 abolished the Interstate
Commerce Commission and assigned regulatory authority for railroads to
the Surface Transportation Board. Despite never having been
reanthorized, the STB continues through annual funding in the federal
budget and pursues the regulatory objectives of assuring revenue
adequacy for the railroad industry, allowing the railroads pricing
flexibility in responding to different market circumstances, and
protecting shippers from the exercise of excessive market power by
railroads.
The Railroad Industry Then and Now
The Staggers Act was adopted amidst fundamental reorganization in
the rail freight industry. Without the legislation, that reorganization
would not have been so extensive or successful. Below is a brief
overview of the change that occurred.
Industry consolidation | When the Staggers Act was passed, the
railroad industry was already experiencing a wave of concentration as a
result of the bankruptcies of many of the Class I railroads. Class I
railroads, defined by meeting an inflation-adjusted annual revenue
threshold, are the largest railroad freight carriers. (The Class I
revenue threshold was approximately $350 million in 2006.) In 1980 there
were 39 Class I railroads, with a four-firm concentration ratio of 35
percent. The Staggers Act facilitated the exit of failing firms. By
1987, 17 Class I railroads remained, and the four-firm concentration had
increased to 55 percent.
[ILLUSTRATION OMITTED]
Mergers, declassification, and the Conrail breakup resulted in
further industry consolidation in the 1990s. Three events in particular
had the largest impact on industry concentration. In 1995, Burlington
Northern merged with the Atchison, Topeka and Santa Fe Railway to form
the BNSF Railway Company. In 1997, the Union Pacific and the Southern
Pacific railroads, by then the second and third largest U.S. railroads,
merged and kept the Union Pacific name. And in 1998 and 1999, Conrail
was broken up into roughly equal parts and absorbed into the CSX and
Norfolk Southern systems. Also, in 1998, the Canadian National Railway,
which had been privatized in 1995, acquired the Illinois Central
Railroad to obtain about a three percent share of the U.S. market.
By 2000, the industry was down to seven Class I railroads, with a
four-firm concentration of about 90 percent. Taking geography into
account, the industry had become a pair of regional duopolies, with the
BNSF and Union Pacific being approximately equal-sized competitors in
the western part of the country and similarly-sized CSX and Norfolk
Southern competing in the east.
Three smaller firms--Canadian National, Kansas City Southern, and
Canadian Pacific--also operate in the United States, along the seams of
the duopolies. That industry structure has remained stable the last 10
years.
Commodity and revenue mix | The two big stories regarding rail
traffic in the last 30 years are the growth of western coal and
intermodal shipments. Over that time, the commodity mix of freight rail
traffic has shifted toward coal, chemical, and intermodal shipments, and
away from farm products and other commodities. As a result of the
increase in western coal and intermodal traffic, the average length of
haul has increased substantially. Over this period, chemical tonnage increased by about the same percentage as did coal tonnage, but the
length of haul for chemical shipments did not change substantially.
The amount of western coal shipped on rails has increased
tremendously in the last 30 years. Among the reasons for this were the
Clean Air Act Amendments of 1990 that called for large reductions in
sulfur dioxide. As a result, the demand for low-sulfur western coal,
particularly coal from the Powder River Basin mines, increased. Also,
trackage enhancements in the 1980s and 1990s greatly increased the
amount of coal from those mines that railroads could handle.
Consequently, by 2000, the ton-mileage of western coal shipped by rail
was almost four times more than in 1979, and average distance shipped
had increased by over 200 miles.
The percentage growth of intermodal rail traffic has greatly
exceeded that of all other commodity groups. This reflects the growth of
consumer good imports from Asia, as well as the shifting of the
transport of domestic goods from the roads to the rails as fuel prices
and highway congestion have increased. By the peak year of 2006,
intermodal traffic was about 6 percent of the ton-miles, accounting for
more than one-third of the car loadings and more than one-sixth of the
railroads' revenues. However, the recent recession has shown the
sensitivity of intermodal rail traffic to economic conditions. By 2009,
intermodal carloadings and tonnage had declined by about 20 percent from
2006 levels.
Density | Industry consolidation, track abandonment, and growth of
traffic volume all combined to produce a tremendous increase in traffic
density on the railroad networks. Between 1980 and 2008, railroad
freight tonnage grew by about 30 percent and the length of haul
increased by 50 percent, largely reflecting the growth of coal and
intermodal traffic. At the same time, the railroads consolidated
networks through mergers and abandonments so that the miles of road and
track each decreased by more than 40 percent. These structural changes
combined to more than triple rail traffic density, as measured by the
ratio of revenue ton-miles per mile of road.
Rail traffic density doubled between 1985 and 1995 as the revenue
ton-miles increased by half and railroads shed a quarter of their miles
of road. Since 1995, traffic density has continued to increase, but at
only about half the earlier pace. Only in the last couple of years,
reflective of the struggling economy, has rail traffic density
substantially declined.
In 2007-08, the STB hired our firm to conduct an independent study
on the state of competition in the U.S. freight railroad industry. We
updated that study in 2009-10. Our econometric estimates of a Class I
industry cost function confirmed that railroads exhibit economies of
density. That is, we found that railroad costs go up proportionately
less than traffic volume increases on a given network. Furthermore, we
found strong economies of density for the industry in 1987, and that
those economies have diminished over the years as traffic density has
increased. Our subsequent work on railroad productivity growth
identified increased traffic density as a leading driver of productivity
gains.
Railroad Industry Performance Post-Staggers
Class I railroads have performed well in the post-Staggers Act era.
Productivity has greatly increased, inflation-adjusted rates to shippers
have declined by a substantial amount, and the financial stability of
the railroads has dramatically improved.
Those improvements began almost immediately after the legislation
was enacted.
[FIGURE 1 OMITTED]
Productivity and costs | Class I railroads have exhibited
tremendous productivity growth since the passage of the Staggers Act.
According to research by Philip Schoech and Joseph Swanson, annual total
factor productivity growth for the railroad industry averaged 3.7
percent between 1980 and 2008, which was about three-and-a-half times
the productivity growth of the overall private business sector during
the same period. As Figure 1 shows, railroad productivity growth also
substantially outpaced the growth experienced by the other deregulated
segments of the transportation sector. This suggests that, at the very
least, the regulatory framework established by the Staggers Act has not
obstructed productivity growth.
The growth in railroad productivity reflects the combination of
high output growth and substantial reductions in inputs. Much of the
output growth can be attributed to flexibilities conferred upon
railroads by Staggers that allowed innovations in service offerings,
contracting, and rate design. In addition, the development of the Powder
River Basin coal reserves contributed significantly to railroad output,
as did the expansion of intermodal services. On the input side, Staggers
allowed railroads to rationalize their networks, as significant amounts
of excess trackage and equipment were shed by the railroads. The total
miles of road owned by Class I railroads, a measure of network size,
decreased by 43 percent since 1980, while Class I trackage declined by
40 percent. Liberalized work rules, industry consolidation, and
reductions in network size and trackage have led to even more dramatic
reductions in labor employment such that the current railroad labor
force is only about one-third what it was in 1980. Other changes, such
as increased locomotive efficiency, innovations in car design (including
increased capacities), longer train lengths, improvements in operating
practices, and technological innovations in train control, all
contributed to the increase in railroad productivity.
Since 1996, however, there has been a marked slowdown in railroad
productivity growth. Schoech and Swanson report that railroad total
factor productivity growth averaged 4.8 percent per year between 1980
and 1996, but has since slowed to an average rate of 2.3 percent per
year. In contrast, while still below railroad productivity growth, the
rate of growth in U.S. private business sector productivity increased
during this latter period. While annual railroad output growth remained
relatively constant over these two periods, an increase in materials
input and a slower reduction in labor inputs appear to be major culprits
in the slowdown of productivity growth for the railroad industry.
Another factor contributing to the railroad productivity growth
slowdown is the diminishing role of economies of density in propelling
railroad productivity growth. Analysis by Kelly Eakin, Schoech, and
Swanson shows that the marginal impact on productivity growth from
increasing traffic volume is roughly proportional to the impact from
decreasing network size. Furthermore, they find that these marginal
impacts in 2008 are about half what they were in 1987.
The evidence indicates that economies of density are significantly
less today than when the Staggers Act was first implemented and that the
"immediate gains" from deregulation have been largely
realized. Consequently, we believe that future railroad productivity
growth will moderate and generally be more in line with that achieved in
the economy overall.
As Figure 1 indicates, very few periods of railroad productivity
decline have occurred since the Staggers Act was signed. The declines
that did occur happened around the economic recessions of 1982 and 1991.
The atypically small productivity gain in 2001 was also in a recession
year. The productivity pause from 1995 to 1997 likely reflects temporary
disruptions resulting from the BNSF merger and then the Union Pacific
merger. We expect that given its magnitude, the recent recession's
impact on revenue ton-miles has further slowed railroad productivity.
The railroads' productivity gains have been translated into
lower costs of producing freight transportation. In our studies for the
STB, we found that the real average cost of a revenue ton-mile decreased
by 31 percent between 1987 and 2008, even though the railroad cost
recovery index (a measure of inflation for railroad inputs) had
increased about twice as much as the producer price index over the
period. However, the productivity slowdown and input price increases
have resulted in fairly large increases in the railroads' marginal
cost of a revenue ton-mile in recent years.
Prices | Shippers today enjoy substantially lower real rates for
rail freight transportation than they did in 1980. Adjusted for
inflation, rates for railroad freight services have decreased by about
40 percent since 1980. As shown in Figure 2, the freight rail rates, as
reported by the 2010 STB rate study and adjusted for inflation,
generally declined through 2004. The STB data also show coal shippers
accumulating noticeably greater rate reductions starting around 1993.
Since 2004, real rail rates have been increasing, with rates to coal
shippers increasing the most. Our calculations for 2008 show a sharp
one-year increase in rates, with the overall real rate index increasing
by about 13 percent. Even more dramatic, the real rate index for coal
indicates a 25 percent increase in rates for these shippers. Because
much of the coal traffic has been shipped under long-term contracts,
those shippers with expiring contracts may actually be experiencing rate
increases several times greater than the increase in the coal rate
index. While all the data have not been finalized, the indications are
that rates decreased in 2009.
[FIGURE 2 OMITTED]
A measure closely related to rates, and reported by commodity
group, is revenue per ton-mile. Between 1980 and 2008, the real revenue
per ton-mile decreased by almost 50 percent, with all commodity groups
experiencing decreases of at least 30 percent. Figure 3 shows how the
real revenue per ton-mile has changed since 1980 for coal, farm
products, and chemical shipments. The figure also shows how the revenue
per ton-mile has changed since 1990 for "miscellaneous mixed
shipments," the category that consists almost entirely of
intermodal shipments. Adjusted for inflation, the prices that shippers
of coal and farm products paid per ton-mile in 2008 were only about half
what they paid in 1980. Chemical shippers have experienced a smaller
decline, with the real price paid per ton-mile in 2008 being about
two-thirds what they paid in 1980. The real revenue per ton-mile
reported for the miscellaneous mixed shipments group has increased since
2004 back to its 1990 value. However, changes between 1990 and 2008 in
the composition of intermodal shipments and in the quality of intermodal
services (e.g., increased speed and reliability) make this comparison
less meaningful.
[FIGURE 3 OMITTED]
Railroad financial stability | The dire financial condition of the
U.S. railroad industry was the motivating force behind the rail reforms
of the 1970s, culminating in the passage of the Staggers Act. The
explicit purpose of the legislation was to "provide for the
restoration, maintenance, and improvement of the physical facilities and
financial stability of the rail system of the United States." The
act was designed "to promote a safe and efficient rail
transportation system by allowing rail carriers to earn adequate
revenue, as determined by the Interstate Commerce Commission."
The financial performance of the railroad industry has improved
substantially in the past 30 years. The first few years after the
Staggers Act saw considerable industry consolidation but little
financial improvement. Between 1980 and 1985, the operating ratio (operating cost to revenues) decreased slightly but remained above 90
percent. Consequently, the return on investment and return on equity
remained below market. Since 1985, however, the railroad industry has
seen steady improvement on the financial front. Our study for the STB
found that the industry appears approximately revenue sufficient since
2006.
Distribution of the productivity gains | The data show that
railroad productivity gains in the post-Staggers era have been
substantial and, in percentage terms, several times the gains achieved
in the airline industry, the trucking industry, and the private business
sector. How have those gains been divided between the railroads and
shippers? Looking at changes in the ratio of industry revenues to
industry cost over time allows us to answer this fundamental question.
That is, the distribution of productivity gains can be separated into
(1) improved margins for the railroads, and (2) mitigation of the
cost-induced rate increases faced by shippers. Making this separation
indicates that, from 1980 to 2008, slightly more than 80 percent of the
productivity gains have gone to shippers in the form of lower rates and
slightly less than 20 percent to railroads in the form of improved
margins. This sharing has not been on a constant 80/20 basis. Instead,
there appears to be distinct subperiods. Between 1980 and 2000, as
nominal rates were falling, all of the gains went to the shippers. But
since 2000, as rates have been increasing, about 90 percent of the gains
have gone to the railroads.
Current Legislative Initiatives
Calls for "re-regulation" of the rail industry were
issued shortly after the Staggers Act was signed, and those calls
persist to present day. Over the years, these initiatives have gathered
little momentum, as consumers were the primary beneficiaries of railroad
productivity growth. However, in recent years, as railroad productivity
growth has slowed and the rates to shippers have increased, calls for
new regulation have become more frequent and louder.
In late 2009, Senator Jay Rockefeller (D, WV) introduced
legislation entitled "The Surface Transportation Board
Reauthorization Act of 2009." The bill would establish the STB as
an independent agency, increase the board membership from three to five,
give it more proactive powers, and provide greater shipper access to the
STB. Among the important changes to policy contained in the bill is the
requirement for railroads to offer "reasonable bottleneck and
terminal switching rates"--i.e., rates must be quoted between any
two points on a railroad's network so that shippers have the
ability to pick and choose segments of various railroads between origin
and destination and not be dependent on a single railroad. With respect
to mergers, the Rockefeller bill would revise the factors the STB must
consider to include effects on public health, safety, and the
environment as well as intercity commuter passenger transportation.
The bottleneck rate requirement is a significant reform worth
singling out for mention. The bill directs the STB to include as part of
a reasonable rate "a reasonable contribution ... to network
infrastructure costs of the non-bottleneck segment." One possible
interpretation of this criterion would be along the lines of efficient
component pricing with a contribution preserving implementation. In that
case, "reasonable" bottleneck rates would have little
financial impact on incumbent railroads and might not provide much
relief to the affected shippers. Regardless, because density and
length-of-haul economies work against splitting routes, we believe that
shippers may be disappointed in the bottleneck rates offered and deemed
reasonable if the legislation were to become law.
"The Railroad Antitrust Enforcement Act of 2009" has also
been introduced in both bodies of the current Congress. This legislation
would extend the applicability to railroads of the federal antitrust
laws and, in contrast to the Rockefeller bill, would restrict some of
the authority of the STB. The proposed antitrust legislation would
authorize the Federal Trade Commission to enforce certain provisions of
the legislation against STB-approved agreements or combinations,
including those related to rates. The act would also authorize FFC enforcement against rail carriers for unfair methods of competition.
Under the bill, private parties could bring actions seeking injunctive
relief against a rail carrier for a violation of the antitrust laws. The
text of the legislation makes explicit that in any civil action against
a rail common carrier, the "U.S. district court shall not be
required to defer to the primary jurisdiction of the STB."
STB reauthorization and railroad antitrust bills have been
introduced in several previous congresses. Neither has ever gotten to a
floor vote. In June 2009, the Senate version of the railroad antitrust
bill was withdrawn by unanimous consent in an agreement between Senators
Rockefeller and Herb Kohl (D, WI) to incorporate its reforms into the
pending STB reauthorization act. Despite months of cooperative efforts
between shipper groups and railroads in helping craft the STB
reauthorization act, the bill is generally opposed by the railroads and
supported by many shipper groups.
Given past history and the present political environment, it seems
unlikely that the current STB reauthorization and railroad antitrust
bills will reach a floor vote. But even if railroad legislation were to
pass, we do not believe it would deliver much rate relief to shippers.
Determining "reasonable rates" is not that simple a matter,
and introduces some chance of reducing market-based incentives in favor
of cost-based regulation. Furthermore, any relief resulting from
legislative reforms could be part of a near zero-sum game. Given that
the railroads are approximately revenue sufficient and that policy
establishes a financially viable railroad industry as an important
objective, any significant rate relief to one group of shippers might
mean other shippers would pay more.
Conclusions
The recovery of the railroad industry has coincided with one of the
more stable periods in U.S. economic history. One wonders the extent to
which the stability and absence of severe economic downturns has
contributed to the railroad industry's phenomenal recovery.
Counterfactually, would there have been a railroad recovery had general
economic conditions been worse?
Some might argue that the Staggers Act had little to do with the
industry recovery as the economy would have generated the growth in
traffic volumes regardless. We reject this view. Our reading of the
evidence is that it was not volume growth per se, but rather increased
traffic density, resulting from a combination of volume growth and
network contraction, that underlies the railroad productivity story. The
Staggers Act provided the industry the flexibility and latitude to make
the most of the good times.
The recent recession that began in December 2007 and possible
ongoing economic sluggishness might be the biggest challenge the
post-Staggers railroad industry has faced to date. How the industry
weathers the current economic storms may reveal the extent that the
Staggers Act provides flexibility to minimize the bad times.
But the challenges facing the railroad industry go beyond the
recent economic downturn. We agree with the observation of our
Christensen Associates colleagues in their article (p. 28) that
"economies of density work both ways." Just as the
industry's recovery can be largely attributed to the growth of coal
and intermodal traffic, the railroads appear vulnerable to future
structural shifts that could work to decrease traffic density. A
plausible scenario would be a significant lessening of the social
appetite for coal, which would diminish the industry's low-cost
baseline load. Likewise, interruptions or contractions of international
trade could substantially reduce the railroads' higher-margin
intermodal traffic. Either scenario could reverse the productivity gains
achieved from increased density, put a greater overhead burden on
customers, and worsen the financial condition of the railroads.
There are future opportunities also. Increased highway congestion
and rising fuel costs could allow rail freight to grow at the expense of
trucking. Future rail productivity gains depend on how the challenges
and opportunities balance out.
The STB also faces ongoing challenges in its oversight of the
railroads. The regulatory framework established by the Staggers Act and
implemented by the ICC and then the STB has allowed the industry wide
latitude to respond to market conditions. Under the ICC and STB's
watch, the post-Staggers Act gains have been substantial and have gone
mostly to consumers while the railroads have gained enough to become a
financially viable industry. But in the process, the Class I railroad industry has become very concentrated, essentially resulting in a pair
of duopolies with many shippers left captive to a single railroad. Thus
it seems that the regulatory backstop established by the Staggers Act to
protect captive customers is every bit as important today as it was in
1980. That is not to suggest that there needs to be a heavier hand of
regulation, but instead that changes in industry structure, financial
conditions, and other market dynamics may lead to more situations in
which the backstop comes into play.
The Staggers Act has lived up to its promise, delivering early,
substantially, and over a long period of time. As we pass into the
second decade of the new century, the state of the freight railroad
industry is sound. Railroad productivity growth in the years ahead will
likely be less than what has been experienced, but enough to sustain the
industry. And the struggle between the railroads and the shippers to
capture those smaller gains may intensify. Such an outcome would further
attest to the Staggers framework resulting in workable regulation. We
are optimistic that the regulatory framework will continue to provide
the market flexibility and the oversight that the freight railroad
industry will need to address future challenges and opportunities.
READINGS
* Study of Competition in the US. Freight Railroad Industry and
Analysis of Proposals that Might Enhance Competition, Revised Final
Report, prepared by Laurits R. Christensen Associates for the Surface
Transportation Board. November 2009.
* An update to the Study of Competition in the U.S. Freight
Railroad Industry, prepared by Laurits R. Christensen Associates for the
Surface Transportation Board. January 2010.
* Patterns of Productivity Growth for U.S. Class I Railroads: An
Examination of Pre- and Post-Deregulation Determinants," by Philip
E. Schoech and Joseph A. Swanson. Christensen Associates working paper,
October 2010.
* Surface Transportation Board Report to Congress Regarding the
Uniform Rail Costing System, prepared by the U.S. Surface Transportation
Board. May 27, 2010.
* Surface Transportation Board Study of Railroad Rates: 1985-2007,
prepared by the U.S. Surface Transportation Board. January 16, 2009.
* The High Cost of Regulating U.S. Railroads," by Douglas W.
Caves, Laurits R. Christensen, and Joseph A. Swanson. Regulation, Vol.
5, No. 1 (January/February 1981).
* Total Factor Productivity in U.S. Class I Railroads 1987
2008," by B. Kelly Eakin, Philip E. Schoech, and Joseph A. Swanson.
Christensen Associates working paper, June 2010.
B. KELLY EAKIN is senior vice president at Christensen Associates,
where A, THOMAS BOZZO, MARK E. MEITZEN, and PHILIP E. SCHOECH are vice
presidents.