Citation From the December 3, 2019, edition of Fox News' Tucker Carlson Tonight

TUCKER CARLSON (HOST): Kind of an amazing moment on Sunday over on NBC, on one of the Sunday shows that people used to pay attention to but no longer do.

U.S. Sen. John Kennedy of Louisiana was on there with Chuck Todd, who was the host, and he made an argument that Todd didn't like. Todd didn't rebut the argument -- not capable of that -- so instead, he did what so many do now. He accused Sen. Kennedy of being an agent of Russia.

...

So, in a normal time, we would all recognize that for what it was: an embarrassing and low moment. Accusing people without evidence, under the cover of journalism of acting on behalf of a foreign government? There is a name for that, actually. It's called McCarthyism. We went through a period where that happened. We learned nothing, apparently, or the left didn't.

That's literally what it is, McCarthyism. But after calling people racist, it's the press' new favorite baseless allegation to throw around.