Franklin D. Roosevelt

During Franklin D. Roosevelt's presidency, Supreme Court consistently ruled portions of the New Deal unconstitutional. To threaten the court, Roosevelt proposed a bill to pack the court by expanding its size. Since the Constitution doesn't enumerate the size of the court, FDR felt he could simply add members to the court until the court was amenable to his policy. This directly threatened to snuff out the independence of USA’s highest court and he lost a great deal of political support for having proposed it.