Sen. Bernie Sanders, I-Vt., provided the Democratic Party with an “autopsy” Monday night, explaining what progressives must do to succeed in future elections.

“What it would say, is the Democrats, the Democratic Party, cannot continue to be run by what I call the liberal elite,” Sanders said said to the Late Show’s Stephen Colbert, repeating messages sent out on his Twitter account around the time the interview was taped in New York.

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