The "politics", vengeful or not, are irrelevant when there are real reasons to prosecute.
Exactly.
If the government is headed in the direction of becoming a banana republic if we do nothing, there is zero excuse for doing nothing. It is the very time to act.
As for the DC court system being rotten, it seems that the chief justice could rule that a federal case may be tried in any federal court in the US.
Regardless, present rules and laws allow appeal eventually to the Supreme Court.