There is a Republican majority in the Senate too now. However is a tiny one, so even a few Republicans could tilt the balance.

It is very easy to reach peace in Ukraine, all you have to do is surrender or sign the Minsk agreement number 16th just to have it broken in a year. The only way for lasting and economically viable peace is to provide Ukraine with certainty in their self-defence, either by joining NATO or by providing means of defence that would deter future aggression.

Trump has promised to end the war quickly, but he has promised many things before.  My guess is that he will force a deal that leaves Ukraine ready for next Putin's invasion, weakens NATO and shows China that there is a lot to be gained by direct military action.

Peace is only a good peace if it is not the beginning of the next war. Else is just pose.