WASHINGTON, D.C. - The hotel summit between Hillary Clinton and Bernie Sanders is over.

The Vermont senator left a Washington, D.C., hotel on Tuesday night after a meeting of about 90 minutes with the presumptive Democratic presidential nominee. There was no sign of Clinton, who earlier won the city's presidential primary election.

The meeting between the two candidates was aimed at brokering a sense of Democratic unity as the primary season ended and the campaign turns toward the general election.

Sanders has yet to endorse Clinton, but has said he's willing to do whatever it takes to defeat presumptive Republican nominee Donald Trump this fall.