Sorry I don't quite understand what you're asking.

I understand the sense and to what end the term populist is often used but to what extent is a political party that wins an election, a populist party given that it's the most popular party? Does a landslide election result mean the winning party is a populist party? If not, why not? As to your question: can you give specific examples to clarify what you mean?

They're elitists, no populists.