A lot of Democrats are still hanging their heads after President-Elect Donald Trump's surprise victory last Tuesday. But not Vermont Senator Bernie Sanders. Hillary Clinton's rival for the 2016 Democratic nomination was his usual upbeat and feisty self when he offered his take on the election - and an autopsy of the Democratic Party - last night on The Late Show with Stephen Colbert.

After Sanders plugged his new book - Our Revolution: a Future to Believe in - Colbert shifted the conversation toward a post-mortem of the election.

"After the 2012 loss of Mitt Romney to Barack Obama, the Republicans commissioned what was loosely called 'the autopsy' of the Republican Party - what was wrong and what they had to do next. If there was an autopsy of the Democratic Party, what would it say?" he asked.

Sanders took a deep breath before launching into a blistering criticism of his party's establishment for being woefully out of touch with ordinary Americans and their daily struggles.

"What it would say is the Democratic Party cannot continue to be run by what I call a 'liberal elite.' Good meaning people. They're not my enemies. They're partners of ours. But the party has got to transform itself to be a party that, first of all, opens the door. That is a party that feels the pain of working class. Of the middle class. Of low-income people. Of young people."

And he believes that the majority of Americans are already on the side of Democrats. The party just needs to embrace them.

"The vast majority of the American people are on our side," Sanders said. "Trump's views are a minority. People do not think we should give tax breaks to billionaires. They do believe we should raise minimum wage and have pay equity for women. They do believe we should make public colleges and universities tuition free."

Then he called on those voters and the rest of the Democratic Party to dig in and stay engaged in politics moving forward.

"So our job right now - and this is terribly important at this moment - what you do now is you get heavily involved in the political process. When millions of people stand up and fight back, we will not be denied."

Sounds like he's already campaigning for 2020. To hear more of Sanders' views, check out the clip below and the recent op-ed he wrote for The New York Times

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