well generally when you are working in politics with a rational opponent this would be the way to go. however, the Democrats are not rational or honorable or really even more than political hacks.
Broder's idea does seem reasonable at first glance. It's only when a person realizes that Democrats have never kept up their end of the deal in any bargain that one sees that it's worthless.
That being said, I wouldn't be at all surprised to find that the Republican leadership would go along with it because it would give them political "cover". They could keep claiming that they're "on our side and did their best" but that the Dems lied and so things continue to slide downhill. We've given Republicans all the power they'd ever need to do what's right and, as fas as I'm concerned, they either do it now or they're finished.