On this day in history, August 24, 1954... The Communist Control Act was signed into law by President Dwight Eisenhower. The Act outlaws the Communist Party of the United States and criminalizes membership in, or support for, the Communist Party. In 1973, an Arizona federal district court decided that the Act was unconstitutional. Nevertheless, the U.S. Supreme Court has never ruled on the Act's constitutionality, no administration has tried to enforce it, and the Communist Party continues to exist in America in the 21st century.