Jeff Weaver, Sen. Bernie Sanders' 2016 campaign manager and author of the new book, "How Bernie Won", told MSBC's 'Morning Joe' that were once "fringe" liberal issues have become "articles of faith" for the Democratic party.
"I think you saw the spark of this in the campaign," he said. "When Bernie started he was at 3%, 4%, 5%, and he was talking about things like free public college, universal health care, $15 minimum wage."
"Those are all basically articles of faith in the Democratic Party now," he added. "And they were considered sort of out on the fringe at the beginning of the campaign."