Today: "The fact there ARE witnesses to testify against the president proves these charges are a conspiracy against the president!"
That's the whole defense, and it's immune to any damning fact.
They just don't care.
Or evidence gets out and the fact somebody squealed proves they're biased against the president—and (as any lawyer can tell you), evidence is inadmissible if the person providing it doesn't have 100% pure motives.
"Your honor, please the court ..."
*shuffles paper, clears throat*
"...we don't really give a shit about any of this. We got 54% of the jury. Defense rests, your honor. Now go get your shinebox."