Let's define those words properly.

Fascism means when one man is a dictator.f

Populatism is a class war - when the workng classes object to the wealth of the rich. They

The media have been using the word 'populist' incorrectly. Followers of Bernie Sanders would be populists.

Followers of Trump are closer to Nazis, but, of course, that is the wrong word.

During the 40s, 50s, and 60s, internationally, every first world country had a mixed economy - partially socialist and partially capitalist. That is what Bernie Sanders wants to have - to go back to the way it used to be.