President Trump took to Twitter on Monday to thank former Senate Democrat leader Harry Reid for calling him “a very, very smart man,” saying, “I agree!”

In an interview with CNN contributor David Axelrod, Reid admitted he used to think Trump was “not too smart” but had since changed his mind. “I don’t think he’s intellectually a powerhouse but he is basically a very, very smart man,” Reid said. “No matter what the subject, any argument he involves himself in, it’s on his terms. You’re always arguing against him.”

“Anyone that thinks Trump’s going to be beaten easily should have another thing coming,” he said in the interview, later adding, “I repeat, he is not going to be beaten easily. It’s going to take a campaign of wisdom and patience, but he is beatable for sure.”

An unconcerned Trump tweeted, “Former Democrat Senator Harry Reid just stated that Donald Trump is very smart, much more popular than people think, is underestimated, and will be hard to beat in the 2020 Election. Thank you Harry, I agree!”