If centrist Democratic senators were having a tough time deciding how to vote on health care, MoveOn.org is trying to provide them with a nudge: it's hitting Sens. Blanche Lincoln (D-AR) and Mary Landrieu (D-LA) with radio ads in their home states, plus direct-mail pieces pressuring those two plus Sens. Ben Nelson (D-NE), Kent Conrad (D-ND), and Olympia Snowe (R-ME).

So far, progressives have backed off pressuring Democrats directly--their strategy has been more to attack insurance companies and remind everyone of the public option's popularity--but now, as we approach the time when senators will have to cast their votes, MoveOn at least has gotten a bit more aggressive.

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