No, this is really not a hard decision. The Dems were going to end that rule anyway. Harry Reid bragged about it, they already repealed it in part, and do you really think Chuck Schumer gives a rip about tradition? All they care about is power. GOP, there is no saving it now, end it and use it against them.
Instapundit: Never say never: I’m up for the challenge
Belmont Club: Salvaging the Obama Doctrine