What about James Cagney and a bunch of Hollyweird Liberals that protested against the Congressional Hearings into he Hollyweird commies.
I don’t know what Cagney’s politics were.
Now I do remember reading the story where Humphrey Bogart, his wife, Lauren Bacall and others went to D.C. to protest the House UnAmerican Committee, not sure of that date, late 1940’s very early 1950’s.