Barack Obama endorsed Joe Biden's White House bid on Tuesday, saying his longtime vice president can unify and "heal" a nation struggling through some of its darkest moments.
The formal backing by perhaps the most popular politician in America is the latest boost for Biden's surging candidacy, and a further sign that Democratic leaders are rallying around the party flagbearer more than six months before November's election.
"Joe has the character and the experience to guide us through one of our darkest times and heal us through a long recovery," Obama said in a 12-minute video.
"I believe Joe has all the qualities we need in a president right now." "Joe helped me manage H1N1 (influenza) and prevent the Ebola epidemic from becoming the type of pandemic we're seeing now," Obama said.