Impeachment is an action taken by the House of Representatives and then tried in the US Senate with the Chief Justice (SCOTUS) presiding over the the trial.
The last time this happened was with William Jefferson Xlinton and the Republican controlled Senate decided not to have “real” trial as they didn’t think they could get the votes to convict.
I am not so certain this Republican controlled Senate would make the same decision. In other words my bet is they would allow the trial to happen and a number of them would vote to convict along with the lock step Democrats.
The GOP’s plan is to go along with the impeachment, then try to get Trump to resign to cover their a$$es. They’ll try to work a deal where he won’t be indicted once he resigns. There’s over 20 republican senators ready and willing to jump on the deal.