CONCORD, N.H. — Bernie Sanders is an avowed socialist who until now rejected the Democratic Party as insufficiently left-wing. Sanders, from Vermont, anchors the very left end of the U.S. Senate, advocates a “revolution,” rejects the American financial sector as inherently fraudulent, proposes $19.6 trillion in tax hikes, and advocates universal government-funded healthcare for all.

And when Democrats got a chance to vote for their presidential nominee in the nation’s first primary, they picked Bernie Sanders.