Sanders has been in politics since 1979 after trying his hand at writing pornography, the dream of every young leftist. As a senator, his views are about as left as you can go without being a card-carrying Communist. He never identified with the Democratic Party until declaring in 2015 that he would run for POTUS.
Bernie, like retired Marine Corps Gen. John Allen, were sell-outs to Hillary Clinton when they supported her Democratic nomination for the presidency at the DNC.
Now Sanders will return to Vermont and his senate seat where he will park his 74-year-old butt. And now that Debbie Wasserman Schultz lost her job over emails that showed she was in the bag for Hillary, she is going to be working as a Clinton senior adviser.
Hopefully both Schultz and Clinton will have a separate adviser for their email security.