I wish I was as optimistic as you are. I just don't see it happening. The rats gracelessness and moral decadence and arrogance has been on display for everyone to see for quite some time and the pubbie "moderates" haven't changed yet. I don't see what would make them change in the future.
On another note, I think this whole mess could easily be avoided in the future if we would just REPEAL THE 17TH AMENDMENT and have the state legislatures appoint senators as the Constitution originally called for. As it is now the senate is basically the same as the House of Representatives only they serve for 6 years rather than 2. Get rid of the 17th, put the power back into the hands of the states, and watch republican senators actually act like republican senators. Of course I know that will never happen.