The United States Senate Committee on Armed Services and United States Senate Committee on Foreign Relations begin their closed door hearings into the dismissal of General Douglas MacArthur by U.S. President Harry Truman.

Harry S. Truman (May 8, 1884 December 26, 1972) was the 33rd president of the United States, serving from 1945 to 1953. A lifetime member of the Democratic Party, he previously served as a U.S. senator from the state of Missouri from 1935 to 1945. He was chosen as incumbent president Franklin D. Roosevelt's running mate for the 1944 presidential election. Truman was inaugurated as vice-president in 1945 and served for less than three months until President Roosevelt died. Now serving as president, Truman implemented the Marshall Plan to rebuild the economy of Western Europe and established both the Truman Doctrine and NATO to contain the expansion of communism. He proposed numerous liberal domestic reforms, but few were enacted by the Conservative Coalition that dominated the Congress.

Truman grew up in Independence, Missouri, and during World War I fought in France as a captain in the Field Artillery. Returning home, he opened a haberdashery in Kansas City, Missouri, and was elected as a judge of Jackson County in 1922. Truman was elected to the United States Senate from Missouri in 1934. In 19401944 he gained national prominence as chairman of the Truman Committee, which was aimed at reducing waste and inefficiency in wartime contracts. Only after assuming the presidency was he informed about the atomic bomb. Truman authorized the first and only use of nuclear weapons in war against Hiroshima and Nagasaki in Japan. Truman's administration engaged in an internationalist foreign policy by working closely with British Prime Minister Clement Attlee. Truman staunchly denounced isolationism. He energized the New Deal coalition during the 1948 presidential election and won a surprise victory against Republican Thomas E. Dewey that secured his own presidential term.

Truman presided over the onset of the Cold War in 1947. He oversaw the Berlin Airlift and Marshall Plan in 1948. He defended South Korea against North Korea in 19501953. It was an embarrassing stalemate. Domestically, his administration successfully guided the economy through the postwar economic challenges such as strikes and inflation. In 1948, he proposed Congress pass comprehensive civil rights legislation. Congress refused, so in 1948 Truman issued Executive Order 9980 and Executive Order 9981 which ended racial discrimination in federal civilian and military affairs.

Corruption in the Truman administration became a central campaign issue in the 1952 presidential election. He was eligible for reelection in 1952, but with weak polls he decided not to run. Republican Dwight D. Eisenhower attacked Truman's record and won easily. Truman went into a retirement marked by the founding of his presidential library and the publication of his memoirs. It was long thought that his retirement years were financially difficult for Truman, resulting in Congress voting a pension for former presidents, but ample evidence eventually emerged that he amassed considerable wealth, some of it while still president. When he left office, Truman's administration was heavily criticized, though critical reassessment of his presidency has improved his reputation among historians and the general population.

The Committee on Armed Services (sometimes abbreviated SASC for Senate Armed Services Committee) is a committee of the United States Senate empowered with legislative oversight of the nation's military, including the Department of Defense, military research and development, nuclear energy (as pertaining to national security), benefits for members of the military, the Selective Service System and other matters related to defense policy. The Armed Services Committee was created as a result of the Legislative Reorganization Act of 1946 following U.S. victory in the Second World War. The bill merged the responsibilities of the Committee on Naval Affairs (established in 1816) and the Committee on Military Affairs (also established in 1816).

Considered one of the most powerful Senate committees, its broad mandate allowed it to report some of the most extensive and revolutionary legislation during the Cold War years, including the National Security Act of 1947. The committee tends to take a more bipartisan approach than other committees, as many of its members formerly served in the military or have major defense interests located in the states they come from. The Committee's regular legislative product is the National Defense Authorization Act (NDAA), which has been passed by Congress and signed into law each year since 1962.The current Chair is Democrat Jack Reed of Rhode Island, and the Ranking Member is Republican Jim Inhofe of Oklahoma.