Two out of three isn't bad. I don't think the Constitution gives them the authority to dismiss the impeachment or refuse to hold the trial. It'd make for an interesting legal challenge but in the end I think the court would require the Senate trial be held. And it would wind up in an acquittal since there aren't 67 votes to convict.
“ but in the end I think the court would require the Senate trial be held.“
The Courts can’t tell Congress squat. They’re a sovereign and co-equal Branch.
L