President Obama on Monday openly cast doubt on Donald Trump’s ability to serve as president and chances for winning the general election in November.

“I think that he is not somebody who even within the Republican Party can be considered as equipped to deal with the problems of this office, but look, we live in a democracy,” Obama told New Hampshire ABC News affiliate WMUR.

“If in fact the Republicans nominate Mr. Trump, then it’s going to be an interesting fall season,” the President added. “I’m confident that ultimately the Democrat in that circumstance will win.”

Obama hasn’t been shy about sharing his feelings about Trump. He mocked the Republican presidential frontrunner during the White House Correspondents’ Dinner and has dismissed Trump’s foreign policy expertise.