Let's, for the sake of argument, assume Trump & Co. Were 100% innocent...
...let's assume they never met with the Russians, they never hired Manafort or Gates. Let's say they never met with Russian operatives on June 9, 2016. Let's assume they didn't change the party platform at the convention to favor a watered down plank Russia wanted. Let's say Trump never called for Russia to hack Hillary's emails or that Roger Stone was never in contact with WikiLeaks. Let's assume Flynn and Stein weren't at a dinner at Putin's table. Let's assume all that didn't happen. Let's say that Trump and his family and his campaign were as innocent as the driven snow.
But still, Putin's Russia supported Trump with hacked emails and on line ads as well as fake face book posts. That Russia, our international adversary, wanted Trump to be our president. That, alone, would be enough to not vote for him or drive him out of office.
No American who loves this country should want a President who is favored by our adversary. If Charles Lindbergh ran against FDR in 1940 and Hitler publicly favored Lindbergh, wouldn't that be enough to be against Lucky Lindy? I wouldn't have needed a Mueller report to put a Roosevelt sticker on my car.