Dale C, Add obstruction of justice and money laundering. They are looking pretty solid, too. As for proof of conspiring with Russians, undoubtedly that happened and odds are, being a hands-on guy (except for policy detail which is supposed to be important for any president), Trump was involved, Just that's more difficult to prove in court.
Look for court action for years after Trump is booted from the position he had neither real right (being a life-long shyster) nor qualification (being a me-me-me no policy detail cretin) to be.