The McCarran-Walter Act and McCarthy-Era Deportations (1952-1965)
Congress passed the Immigration and Nationality Act of 1952 over President Truman's veto, giving the government broad power to deport noncitizens for communist affiliations or "subversive" beliefs. The law was used to exclude and deport thousands, including labor organizer Harry Bridges (whose deportation the Supreme Court reversed in 1945) and countless others deemed security threats for their political associations.
Immigration enforcement became a tool of Cold War politics, with the Attorney General gaining wide discretion to exclude or deport based on ideology.
Congress amended the law in 1990 to protect "beliefs, statements, or associations" that are "lawful within the United States," raising the bar for foreign policy deportations. The provision went largely unused until 2025.
The same statute written to deport communists is now being used against pro-Palestinian activists. The government argues the 1990 amendments don't prevent deportation; Khalil's lawyers argue they do.
