Evidence has already been given in the thread. We have indisputable evidence that Trump asked the Russians to hack Hillary's emails, we have indisputable evidence the Russians took a pro-Trump position and provided propaganda on behalf of Trump in his election. Of course, there's plenty of less-than indisputable evidence of many other facets of RussiaGate as well, but the nominee asking for help from Russians right there is enough to to take action against him.
I will add that your side's "actual objectively verifiable" evidence standard is a joke, since anything the CIA/FBI says you laugh at by saying the Russians would never leave clues. Your side isn't scientific, it's a RELIGION.