Well that's just a 'do you support him or not' question, really. I mean, people wanted to impeach Obama because they disliked him, not because he did anything impeachable.
That said, I think the question "will congress impeach Trump" is a more interesting one.
You're right. Congress. That's what it comes down to. My thinking is that there will be business ties that are so blatant that Congress won't have a choice. Either that or Russian ties. But it's going to need to be something that no one can deny. Maybe an over the top public meltdown that proves his instability? A drug problem surfaces? Anyone's guess. But if there's enough GOP lawmakers whose positions are threatened because of Trump's actions, they'll sell him out in a literal New York minute.