In Addition....

Well, from what I've read on the internet (aka wikipedia) and our previosu history text book, the depiction of Jow McCarthy in the movie seems to be fairly accurate. He used brutal, accusatory, reckless tactics to "expose" the many alleged communists in the US, stamping on the Constitution while he was at it. An interesting fact, he was elected a curcuit judge in 1935, the youngest elected in Wisconsin state history. 

However, there is still that whole thing about making outrageous accusations and then not being able to prove them....