Did you catch this? Antiwar Democrat Jan Schakowsky (D-Ill) says there will be more Republicans to come, and she believes she knows why. "I just see the growing fear in their eyes on this," she said. More details, and my source for the quote, can be found here.
I have no doubt she's right, in that too many Republicans are frightened of polls. It's not a principled position. Fundamental: we can't make policy solely based on polls. If we had, we wouldn't be one nation right now. We'd be two, with a Confederate States of America existing to our south--because Abraham Lincoln would have abandoned the Civil War in the summer of 1864 when, as most observers claimed, Northern public opinion had grown tired of the war.