On Tuesday, Obama released a video on social media where he said: "Republicans occupying the White House and running the U.S. Senate are not interested in progress. They're interested in power."

Obama said: "The kind of leadership that's guided by knowledge and experience; honesty and humility; empathy and grace – that kind of leadership doesn't just belong in our state capitols and mayors offices. It belongs in the White House.

"That's why I'm so proud to endorse Joe Biden for President of the United States.

"Choosing Joe to by my Vice President was one of the best decisions I ever made and he became a close friend

"And I believe Joe has all the qualities we need in a President right now."