Trumpers are willing to forgive Trump for anything he does, lie for him, and betray their country because to admit that he did something wrong is to admit that maybe they made a mistake in voting for him and supporting him. It's easier for them to lie to themselves than to admit that they royally fucked up.
I am amazed that Trump continues to enjoy continuing support from America's tiny-brained folk. Our Trumpers, in particular, would take a bullet for him. By November 2020, a vast array of Trump's crimes will have been exposed--and virtually none of the Trumper scum will care. If you want an interesting metric, consider how many Republican Senators and Congresspersons have broken from Trump--two? three? I expect the same proportions in the electorate.
Or to put it another way, the people who elected a known criminal aren't going to be discouraged by further evidence of that person's criminality. They knew who and what he was when they voted for him.