The SCOTUS won't touch that one with a 10-foot pole.
No, but there is the precedent of a motion to dismiss. It was made by Democrats at the start of Clinton's Senate trial and narrowly defeated. All it takes is a majority vote - so what can be done to persuade Romney, Murkowski and Collins that, on the basis of the competing majority and minority House reports, the case has been laid out for the edification of the people and that a Senate trial would be simply prolonging a national nightmare, especially given the proximity of the election?
This is theater, of the tragic variety. Meanwhile, there are urgent matters of government that are being shunted aside. Yes, Trump wants to prolong the theater as much as the most partisan Dems do, because that's his thing. But the rest of us are weary of the insular hatred that infects Washington. Let's lance the boil.
I support a vote on a motion to dismiss on the first day of a Senate trial. GOP Senate leadership should start working behind the scenes now to make sure it has the votes to pass.