Comment Comment by perihelions The US did this before; there was a Cold War-era law SCOTUS ruled unconstitutional in 1964.https://en.wikipedia.org/wiki/Aptheker_v._Secretary_of_State ("Aptheker v. Secretary of State" (1964))> In Aptheker, the petitioner challenged Section 6 of the Subversive Activities Control Act of 1950, which made it a crime for any member of a Communist organization to attempt to use or obtain a passport.[1]"Some expanded context,https://en.wikipedia.org/wiki/Freedom_of_movement_under_Unit... ("Freedom of movement under United States law") parent perihelions 1 year ago
https://en.wikipedia.org/wiki/Aptheker_v._Secretary_of_State ("Aptheker v. Secretary of State" (1964))
> In Aptheker, the petitioner challenged Section 6 of the Subversive Activities Control Act of 1950, which made it a crime for any member of a Communist organization to attempt to use or obtain a passport.[1]"
Some expanded context,
https://en.wikipedia.org/wiki/Freedom_of_movement_under_Unit... ("Freedom of movement under United States law")