Frankly, I think bipartisanship support for the Stimulus package is probably a waste of time in the current situation.
I don't see any reason to think the GOP is going to do anything constructive until they realize that they have something to lose. Obama needs to make it clear he's going to pass something they like less if they aren't willing to compromise.
Gergen is talking on CNN is talking about "driving the GOP away" but if they're NOT going to vote for it anyway then there's little reason to placate them. IF the GOP wants to get stuff out of the bill, some of them need to be willing to provide a few votes at the end of the day.