No one has yet to prove McCarthy wrong about anyone he accused. The reds DID have the government thoroughly penetrated. Joe's only fault was that he didn't work hard enough exposing the commies in the media and academia.
You can see the result of that failure today in just about every university and college in American, and at most major news organizations.
Fox, WaTimes, NY Post, and some others excepted.
He couldn't. His only pervue as PSI chair was communist infiltration of the United States government.