I would argue that he most definitely is a champion for radical change and that's why he won. "Drain the swamp", "Dictator on day one", " He says it like it is" are all things that deviate dramatically from the status quo of political etiquette. Trump is willing to break political norms to get what he wants and evidently voters think his interests align with their own.

Obviously, this isn't the kind of radical change you or I are hoping for but it certainly is radical. Meanwhile, the Dems are playing it safe in an attempt to appeal broadly and not upset too many people. And we've seen for the last decade that gets us at best legislation which has been gutted to the point where it does effectively nothing for the majority of Americans.