U.S. Senate Committee on Foreign Relations

The U.S. Senate Committee on Foreign Relations is shown as a Senate forum where international agreements and the conduct of foreign policy met the constraints of domestic deliberation. The book traces that role from a vote on a water treaty with Mexico to the joint hearings on Douglas MacArthur’s dismissal, where military strategy and presidential authority became subjects of public scrutiny.

Treaty Ratification

In the Senate, the main business was ratification of a water treaty with Mexico affecting use of the Colorado and Rio Grande. Committee chairman Connally spoke first in support, followed by Ernest McFarland of Arizona, who also urged ratification. The episode places the committee’s work within the Senate’s practical business of weighing international agreements, alongside other immediate concerns such as a shortage of boxcars that was leaving wheat to spoil on the ground.

Harry S. Truman, then a senator, briefly left the proceedings to attend to a Missouri soldier in his office. He asked Republican Senator Saltonstall to take his place and promised to return within an hour. Saltonstall later remembered that Truman kept his word and was back on time. The small exchange gives the treaty debate a concrete setting: foreign policy deliberation proceeded through ordinary Senate procedure, with senators temporarily covering one another’s duties.

The MacArthur Hearings

In the late spring of 1951, the U.S. Senate Committee on Foreign Relations and the Senate Armed Services Committee held seven weeks of joint hearings on MacArthur’s dismissal. Chaired by Senator Richard B. Russell, the inquiry opened on May 3 in the Senate Office Building’s marble Caucus Room, room 318—the same room where the Truman Committee had held its sessions. Although the hearings were closed, edited transcripts were released to the press each hour, with changes made for military security.

MacArthur was the first witness and testified for three days. He defended his strategy in Korea as the route to victory and an end to the slaughter, while criticizing the administration’s approach as appeasement. His testimony also exposed a central dispute: he treated the Korean campaign as his principal responsibility and discounted the risk that extending the war to China could provoke a wider conflict. The hearings gave senators a structured opportunity to examine that claim against the administration’s broader strategic concerns.

Testimony and Civilian Authority

The decisive turn came with testimony from Henry Stimson, Omar N. Bradley, and the Joint Chiefs of Staff. Over nineteen days, they rejected MacArthur’s assertion that they supported his strategy. Their evidence supplied the military backing Harry S. Truman had wanted before publicly defending his decision, lending it weight while undermining MacArthur’s position.

The witnesses argued that Korea offered no easy or decisive victory short of another world war, and that the costs of the existing policy had to be weighed against the danger of atomic conflict. In this account, the committee’s hearings did more than revisit a dismissal: they tested competing military judgments and made the limits of battlefield command answerable to wider national policy. The committee thus became a crucial institutional setting for debating how the United States could pursue its aims in Korea without allowing the conflict to expand into another world war.