What a tease!! ;-)
I also remember reading about Ronald Reagan's role in stopping a communist takeover of the Screen Actors Guild, after they'd already pulled off coups in some of the trade unions. As I recall Reagan, Bill Holden and other anti-communists had some hairy moments facing the commies down.
Of course, the left conveniently forgets that McCarthy and the government did absolutely nothing about the commies other than hold hearings, and prosecute a few spies. The "blacklist" was done by the studios because they rightly judged the public wouldn't want to watch commie propaganda movies, something modern Hollywood has forgotten. The strongest measure Congress passed against the communists was a registration law that never went into effect because it bounced around in the courts so long.