Let it run. Like the Wellstone Funeral/Campaign Rally, it will backfire in their faces.
I just spoke to a Democrat today who's so disgusted by this that he's sitting out in Novemeber.
Then again, most Americans are easily manipulated these days. Afterall, there was a poll just the other day (in this booming economy) that said that MOST Americans think the economy is on the downslide. Brilliant!