At this point we can only speculate on what sort of dirt the Russians have on Trump. It couldn't be anymore than what we Americans have on him.
In fact, Trump was so disgraced, we elected him president.
Let's say it comes out that Trump has a Russian mistress. He would still have time to marry her by January 20.
By the way, if Meryl Streep went on "Saturday Night Live" and recited a passage from the musical "Hamilton", Trump could hit three targets with one tweet -- giving him more time to govern.