The usual answer is some mix of, I like his policies, he tells it like it is, and the Democrats are worse.

Sounds good but makes little sense. He contradicts himself constantly. Anyone will find policies of his that they can agree with, because he covers the spectrum. You want strict gun control and universal government health care? He’s your guy. You’re a 2A absolutist and think health care should be totally unregulated? Trump is your man! Likewise with “tells it like it is.” I’m convinced that his popularity is mostly due to the fact that he just spews so much crap. If you manage to only hear the parts you like, you’ll think he’s great.

“The Democrats are worse” could be sensible, but it’s almost always based on a notion of Democrats that’s completely disconnected from reality.