WASHINGTON (AP) – On the verge of endorsing Hillary Clinton, President Barack Obama will pay tribute to Bernie Sanders’ historic candidacy for presidency with an Oval Office meeting later this morning. The session is aimed at unifying the Democratic Party for a general election brawl with Donald Trump.

Sanders heads to the White House under intense pressure to drop out and clear the way for Clinton. Though he showed signs he understood the end was near, he’s vowed to keep fighting for his movement.

Obama has sought to give the Vermont senator the courtesy of exiting the race on his own terms, but is expected to formally endorse Clinton after the meeting. The White House says he plans to use the meeting to discuss how to build on the enthusiasm Sanders brought to the primary.