They’ll punish him the same way they punished Charlie Rangle. They’ll “censure” him, he’ll keep his senate seat, and that will be the end of that.
That depends on whether the democrats can com3e up with a pretext to ignore the various treaties on international sex tourism that we signed onto ten years ago/
He should not have diplomatic immunity of any sort on his unauthorized junkets, and if the Dominican Republic demands we extradite him there for trial per our signed treaties there isn’t much pretext I can see not to send him.
Let him rot in one of their jails pending a trial that our FBI will likely have turned over the evidence for.