Went to see Good Night and Good Luck this weekend. I've never been a real fan of George Clooney, but he may have talked me into it with this one. While I would have been happier with a defense against McCarthy that didn't include "I'm not a Communist" as part of its substance, I also get that we're dealing with a real historical record here. I don't know much about Morrow's run-in with McCarthy, but probably that is part of what he offered in his defense.
Be that as it may, I liked it. Twice Clooney goes out of his way to smack the audience upside the head in case they are missing the contemporary parallels. (I'm sure many did nonetheless.) First he uses the word "terror" to make his point and then the film ends with a clip from Eisenhower praising Habeas Corpus. I mean, just in case you didn't get it yet.
On a funnier note (sort of) according to IMDB:
Director/star George Clooney had said they opted to use archive footage of Joseph McCarthy instead of using an actor to portray the senator. Clooney had said that when the movie had undergone test screenings, audience members felt that the McCarthy character was overacting a bit, not realizing that it was the actual McCarthy through archive footage.