I suppose it's a typical leftist mindset that people should be able to break contracts and essentially steal money from the other party by not fulfilling their obligations while pocketing the money. Apparently Trump doesn't agree with that. Good on him.
So now it's "leftist" when the Flim Flam Führer doesn't pay his contractors? It's "leftist" when he reneges on his debts? It's "leftist" when management helps itself to a pension fund?
Free clue: "leftist" does not mean "people I don't like."