Sanders Endorses Biden Unlisted Video

On Monday, Sen. Bernie Sanders officially endorsed former Vice President Joe Biden for President of the United States.
Sanders dropped out of the race on Wednesday.
He failed to gain momentum in a series of vital primary elections.
Since Sanders dropped out, Biden's campaign has made an effort to reach out to Sanders' base.
Sanders staunchest supporters are angry at Sanders, calling him a "sell out" for endorsing Biden so early.