Bernie Sanders endorses Joe Biden for president

Vermont Sen. Bernie Sanders on Monday officially endorsed former Vice President Joe Biden for president.

"We need you in the White House. I will do all that I can to see that that happens, Joe," Sanders said to the former vice president during a livestream broadcast by Biden's campaign on his website and on social media.

The endorsement of Biden by his leading Democratic rival marks a key moment for Democrats as the party seeks to unify and turn its focus toward a November match-up with President Donald Trump. -- Watch live at https://www.twitch.tv/werenotsorry