There's enough for Mueller to nail Trump and associates, I would guess, along with the obstruction of justice, money laundering, lying, etc.
I still don't believe there was a grand plan behind working with Putin to win the election. First, Trump's too dumb for that. Second, I don't think he even wanted to win. Who knows, though.
But I have confidence in Mueller. I think we'll learn a lot more by the time this is all over.