They've been gunning for him for a while now, well before the second impeachment farce. Last I heard, they were trying to determine whether he was of sound enough mind to continue to practice law, and of course they'd never be biased in making that determination.

His defense is that there is a reasonable basis for his public statements. They are giving him a platform, and it won't be one where he will be denied the ability to present evidence.

Lawyers are not allowed to be involved in politics...oh wait...