On July 8, ABC News’s George Stephanopoulos asked President Trump’s lawyer Rudolph W. Giuliani whether he was concerned that Trump’s longtime lawyer, Michael Cohen, might flip on the president.

“I have no concerns that Michael Cohen is going to do anything but tell the truth, and if he does, as I said, there’s no suggestion that anything happened,” Giuliani said at the time.

Now with Cohen reportedly prepared to flip on Trump less than two weeks later, Giuliani is singing a much different tune about a man he once called an “honest, honorable lawyer.”

“This guy is a proven liar,” Giuliani told CNN on Thursday. “A year ago, when I wasn’t his lawyer, people in your profession told me this guy will flip because he is an inherent, pathological liar.”

The sudden focus on discrediting Trump’s longtime lawyer — which you can see in the video above — suggests the investigations into Cohen and Russian election interference could come down, in part, to Cohen’s credibility. Or at least Trump’s legal team seems to think so.

Cohen did not say Trump had advance knowledge of a June 2016 meeting with Donald Trump Jr. and Russian lawyer Natalia Veselnitskaya before the House Intelligence Committee in 2017. And both Trump and Trump Jr. have repeatedly denied that Trump knew about the meeting before it happened.

“It was such a nothing, there was nothing to tell,” Trump Jr. told Fox News’s Sean Hannity in July 2017, denying any mention of the meeting to candidate Donald Trump.

Less than an hour after the interview aired, none other than Michael Cohen weighed in on Twitter.

“So proud of @DonaldJTrumpJr for being open, honest and transparent to the American people,” Cohen tweeted. “This nonsense needs to stop!”