Communist Control Act of 1954 still on the books. never challenged by the Supreme Court.

Legislative history

Introduced in the Senate as S. 3706

Passed the Senate on August 12, 1954 (85-0)

Passed the House on August 16, 1954 (305-2)

Reported by the joint conference committee on August 19, 1954; agreed to by the Senate on August 19, 1954 (79-0) and by the House on August 19, 1954 (266-2)

Signed into law by President Dwight Eisenhower on August 24, 1954

https://en.wikipedia.org/wiki/Communist_Control_Act_of_1954