barack obama Hillary Clinton
President Barack Obama endorsed Hillary Clinton in a video posted to the presumptive Democratic nominee's YouTube account Thursday afternoon.

"I know how hard this job can be. That's why I know Hillary will be so good at it. I don't think anyone has been more qualified for this office," Obama said.

He added: "I want those of you who've been with me from the beginning of this incredible journey to know that I'm with her."

The president's endorsement came just over an hour after Obama concluded a meeting with Sen. Bernie Sanders, who pledged to stay in the race through the final primary contest in Washington, DC, next week.

In Thursday's endorsement video, the president praised Sanders for emphasizing the issue of money in politics and energizing young voters. He also brushed off concerns that a contentious primary left the Democratic Party more fractured.

"I know that some say these primaries have somehow left the Democratic Party more divided," Obama said. "Well some people said that eight years ago."

In a brief appearance at the White House on Thursday, Sanders thanked Obama and Vice President Joe Biden for staying neutral throughout the Democratic primary, and he congratulated Clinton on her campaign.

"I'm with her."
Reuters

"I spoke briefly to Secretary Clinton on Tuesday night, and I congratulated her on her very strong campaign," Sanders said. "I look forward to meeting with her in the near future to see how we can work together to defeat Donald Trump and to create a government which represents all of us and not just the 1%."

Obama and Clinton will make their first official campaign appearance together in Green Bay, Wisconsin, on Wednesday, the Clinton campaign said.

Donald Trump, the presumptive Republican presidential nominee, quickly responded on Twitter, slamming Obama's endorsement.

Watch the endorsement video below: