and takes a lot of the human scum with him. But, destroying evidence has been ongoing, to the extent possible, since he took office. If Trump resigns, he will wait until after the election is over and only if Pence promises to pardon him. I don't think Trump's ego will allow that, he might have to be evicted when his term is over.
Most of the evidence of his crimes will not have been destroyed, because there is too much, with copies in too many places. I believe that you will see criminal, congressional, and civil actions brought against Trump and those who colluded with him.