'This is the presidency': Conservative Jennifer Rubin says new Cohen revelations demonstrate collusion and make Trump's 'entire presidency illegitimate'

Thursday night's revelations that Michael Cohen will testify that Donald Trump knew about his son Donald Trump Jr's plans to meet with a Russian spy to discuss getting "dirt" on Hillary Clinton has caused a breakthrough with some analysts.

Washington Post conservative columnist Jennifer Rubin is not a Trump defender, but has stopped short of declaring that Trump clearly engaged in collusion with the Russians.

"This is collusion," she said. "This is a fraud on the American people. This is a fraud on the election. It makes his entire presidency, in my mind, illegitimate. This is the thing that he's been worried about all along. He's been afraid that Democrats are trying to discredit his administration, his presidency. And guess what? They're right. Because if he did this, he got elected with the help of a hostile foreign power."

Rubin said that Trump's panic after Cohen's offices were raided "is now very explainable."

Trump's claims about a "witch hunt" now appear absurd, she suggested.

"Well, the witches are in packs and droves now. They're popping up out of every corner. And, if this is correct—and we have to have that caveat again and again and again, we do not know if Michael Cohen really is going to say this and they're really corroborating witnesses—but if there were, this is it. This is the presidency."

Watch below.