Assuming this clears hearsay judgement (and it should, relating to his mental state at the time), it’s a MOAB.

Trump’s defense in has been an insistence that he believes he actually won, and not obstructing congress to overturn the election, but to uphold it.

In the Federal D.C. case in particular, he’s the only indicted defendant, so his only avenue to really argue his belief that he won, he’s going to have to take the stand. And that means cross examination. And that’s almost guaranteed to result in perjury.