I hate this term “populism” which is historically inaccurate. Populists were socialists NOT nationalists. They wanted gubment ownership of railroads, elevators, inflation, and BIG government.
He isn't invoking the short lived Populist party here. He's using the term "populism" as a vague scare word intended to conjure up images of mob rule.
They stole “liberalism” from us, too.