No, Bernie is the US populist candidate seeking the DNC's endorsement for the 2016 presidential election. Yes, that means his policies are based in social democracy.
Populism is objective, and populist candidates are relative to their respective countries. In the US, the populist movement is determined to form a "worker's socialist state" (a heavily worker's right state, s.t. [{gross profit - (t,w,m)} <= 0] for most domestic companies). Economic history has shown that worker's socialist states do not fair well in the long term.
Look at Hellenic Republic, the population is now suffering more than they should; because to many of value added companies went bankrupt. The state is so bad, they can't even package their own olives for individual consumer export.
<I don;t have enough points for a meme here> I like my Greek olives picked by BUlgarian immigrants and packaged in Italy.