We need a constitutional amendment providing for the recall of senators (I don’t think one is necessary for reps, since their term is only two years). This is far from the first instance of a senator betraying those who voted for him/her right after election, since they know they now have six years before they must face the voters again, and most of our nitwit voters will have forgotten early betrayals almost six years in the pazt.
Of course, the prospect for such an amendment garnering the necessary votes in the Senate to go to the states is exactly zero.
I think giving state legislatures the power to recall senators is a good idea. It would help undo some of the problems of direct election of senators but would have the political advantage of not seeking to reverse it outright. It could be sold as empowering the people by giving them a way to control an out of control senator via their state legislature. Maybe it could even be done by popular referendum within the state — in which case it really would be a “power to the people” thing rather than a “states rights” thing.