There's plenty of evidence of Trump's campaign colluded with Russia now but...

none of it implicates Trump himself directly.
The evidence damns his minions but nothing proves Trump was behind it.

Sure it's nearly impossible that he didn't know about it and probably approved but without direct proof it's still nearly impossible which gives him and his lawyers room to squirm away.

It's so frustrating to hear him say he knew nothing this and there's no evidence to prove him wrong.

When will we hear of direct, incontrovertible proof that Donald Trump himself was knowledgeable and onboard with all the illegal criminality?

I sure hope Mueller has something on this and it's exposed before too long.
Otherwise I may have to go on a steady diet of antacids and anti-depressants.