The Judicial Procedures Reform Bill of 1937 (frequently called the "court-packing plan") was a legislative initiative proposed by U.S. President Franklin D. Roosevelt to add more justices to the U.S. Supreme Court. Roosevelt's purpose was to obtain favorable rulings regarding New Deal legislation that the court had ruled unconstitutional. The central provision of the bill would have granted the President power to appoint an additional Justice to the U.S. Supreme Court, up to a maximum of six, for every member of the court over the age of 70 years and 6 months.
In the Judiciary Act of 1869 Congress had established that the United States Supreme Court would consist of the Chief Justice and eight associate justices. During Roosevelt's first term the Supreme Court struck down several New Deal measures as being unconstitutional. Roosevelt sought to reverse this by changing the makeup of the court through the appointment of new additional justices who he hoped would rule his legislative initiatives did not exceed the constitutional authority of the government. Since the U.S. Constitution does not define the size of the Supreme Court, Roosevelt pointed out that it was within the power of the Congress to change it. The legislation was viewed by members of both parties as an attempt to stack the court, and was opposed by many Democrats, including Vice President John Nance Garner. The bill came to be known as Roosevelt's "court-packing plan".
In November 1936, Roosevelt won a sweeping reelection victory. In the months following, Roosevelt boldly proposed to reorganize the federal judiciary by adding a new justice each time a justice reached age seventy and failed to retire. The legislation was unveiled on February 5, 1937, and was the subject of Roosevelt's 9th Fireside chat of March 9, 1937. Three weeks after the radio address the Supreme Court published an opinion upholding a Washington state minimum wage law in West Coast Hotel Co. v. Parrish. The 5–4 ruling was the result of the apparently sudden jurisprudential shift by Associate Justice Owen Roberts, who joined with the wing of the bench supportive to the New Deal legislation. Since Roberts had previously ruled against most New Deal legislation, his support here was seen as a result of the political pressure the president was exerting on the court. Some interpreted his reversal as an effort to maintain the Court's judicial independence by alleviating the political pressure to create a court more friendly to the New Deal. This reversal came to be known as "the switch in time that saved nine"; however, recent legal-historical scholarship has called that narrative into question as Roberts's decision and vote in the Parrish case predated both the public announcement and introduction of the 1937 bill.