His vote was worthless. If the Senate was 50/50, he would have switched parties anyway. Of all the people who lost tonight, he was one of the few who really deserved to lose.
The problem is not too many "blue state" RINO congresscritters, it's too many "red state" Democrat congresscritters. Find a way to get rid of the Kent Conrads, the Max Baucases and the Brian Dorgans and the RINOs will truly become expendable (and/or a lot more conservative) once again.