A number of people in the major social networks are accusing Bernie Sanders of selling himself out to Hillary Clinton. Bernie Sanders didn't actually sell out because that would've required him to possess integrity and the best of intentions in the first place. Sanders was never "in-it-to-win-it", this was all a staged sham from day one. The fix was in from when he publicly declared to George Stephanopoulos on ABC News last May that he wouldn't run as an Independent in the event of losing the nomination.
He's been friends with the Clinton's for years and has supported their various candidacies - and once again he's supported yet another Clinton candidacy. This time (with help from TYT) by running a fake opposition campaign that gave HRC the public illusion of having to work hard for the nomination, shielded her from a genuine leftist rival and shored up the Democrats left by bringing in voters who might otherwise have considered the Independents or rejected the entire political process altogether.