Democrats in Congress are rattled over the momentum Alaska Gov. Sarah Palin (R) has brought to John McCain’s presidential campaign and disagree about how their candidate should respond.

Some Democrats say that Democratic nominee Barack Obama’s campaign must take a tougher approach and challenge Palin directly on her lack of experience and stance on abortion, creationism and federal earmarks.

Rep. Debbie Wasserman Schultz (D-Fla.), a mother of three young children, has emerged as a spokeswoman for the campaign on media queries about Palin, making television appearances in recent days to support Obama’s campaign. She also participated in a conference call with reporters the day after Palin’s convention speech.

“Palin is bad for America on the issues,” she said, citing the Alaska governor’s opposition to abortion rights and legislation to ensure equal pay for women.

Wasserman Schultz said she has been on the campaign’s media surrogate team since June and has been asked to respond to media inquiries about Palin. But the Florida lawmaker said she has not been given an assignment as Palin’s official foil.

Palin was the talk of the Hill as lawmakers returning to Washington woke up Tuesday morning to headlines declaring that Sen. McCain (R-Ariz.), the GOP nominee, has pulled even with Sen. Obama (D-Ill.) in national polls. The jump is due to a 20-point swing among white women, who now favor the McCain-Palin ticket by 12 points, according to a Washington Post–ABC News poll.

“That’s all people have talked about since we got back,” said Rep. Emanuel Cleaver, a Democrat who represents Missouri, a projected battleground state. “I received a phone call from an Obama fundraiser who said we’re going to have to go back and revisit the strategy.”

Since Palin made her national political debut last week, Obama’s campaign and other Democrats have been slow to criticize Palin, preferring to let mainstream news outlets and liberal blogs raise questions about her record.

But Democrats are growing concerned that Obama’s campaign has not challenged Palin’s lack of experience and views on abortion, creationism and the Iraq war more aggressively.

“There’s anxiety developing because of a perceived lack of aggressiveness,” said Rep. Bennie Thompson (D-Miss.), an early Obama supporter. “There’s natural anxiety when one feels they’re behind.”

Democrats say that Obama’s campaign should get tougher on Palin and challenge her opposition to the right to abortion in cases of rape or incest, her support for teaching creationism in schools and her characterization of the Iraq war as a “task that is from God.”

Republicans have tried to paint critics of Palin as bullies. Last week, former Sen. Fred Thompson (R-Tenn.) accused The New York Times of “trying their best to drag her down.”

But some Democrats say that Obama’s campaign cannot let itself be cowed.

“They have to be careful of being defensive,” said Rep. Jim Moran (D-Va.). “The best defense is a good offense. She’s probably the least qualified person ever to be picked for vice president.”