In desperate fund-raising appeal on behalf of Sen. Russ Feingold, MoveOn’s Michael Sherrad writes in an e-mail to supporters that Feingold “could lose” to GOP challenger Ron Johnson:

Because keeping Sen. Feingold’s voice in the Senate is so important, this race has become our top national priority. Sen. Feingold’s campaign is up against a critical fundraising deadline that expires tomorrow. Right now, he urgently needs the resources to expand his grass-roots campaign, reach out to more voters and get his message out in Wisconsin. We’re aiming to raise $300,000 for Sen. Feingold’s campaign before the deadline.

Even Feingold himself — trailing Johnson by more than 8 points according to the RealClearPolitics poll average — admits this much.