What was the McCarran Act?

Answer 1

looked for communist and could potentially revoke their citizenship of USA for up to five years

it was vetoed by Truman because it went against constitution and would give communist a strong argument against USA's government

Answer 2

McCarran Internal Security Act, also known as the Internal Security Act, requires the registration of Communist organizations with the U.S. Attorney General. Its purpose is to protect the United States against subversive activities.

Answer 3

The McCarran Internal Security Act created the Subversive Activities Control Board, and made it so communist organizations had to register with the Attorney General of the United States. It was vetoed by Harry Truman, but his veto was overridden by Congress.