On Friday, Rep. Seth Moulton (D-Mass.) is expected to become the fourth Democrat to drop out of the 2020 presidential race. In an interview with The New York Times announcing his impending withdrawal, Moulton warned that Democrats are rushing to the far left, and that they might sacrifice the 2020 presidential election to Donald Trump if they’re not careful.

“I think it’s evident that this is now a three-way race between Biden, Warren and Sanders, and really it’s a debate about how far left the party should go,” Moulton said. “Candidly, getting in the race late was a mistake. It was a bigger handicap than I expected.”

The congressman is facing a primary challenge from three other Democrats.

“I’ve always said that veering too far left could result in us losing this election, and that Trump will be harder to beat than most people think,” the departing candidate warned.

He would not endorse Joe Biden, but he did praise the frontrunner. “I’m not going to endorse anyone right away, but the vice president is a mentor and a friend and I think he’d make a great president,” Moulton said. “Anybody in this race will be better than Donald Trump and I will enthusiastically support whoever the nominee is.”

Follow Tyler O’Neil, the author of this article, on Twitter at @Tyler2ONeil.