Donald Lambro

WASHINGTON -- Barack Obama is coming under increasingly heavy fire from his left flank for abandoning long-held liberal positions in an abrupt swing toward the center that threatens his candidacy.

After racing away from hardcore positions on trade protectionism, gun control, government wiretapping, the death penalty and even his vaunted troop-pullout plans for Iraq, his once-diehard supporters on the left are attacking his character and honesty and threatening to withhold campaign contributions or, worse, shift their allegiance to Ralph Nader.

"We've been hearing more from voters who are disconcerted about Obama's move to the right. We're hearing from antiwar folks, civil-liberties people and other activists concerned about his flip-flops and considering voting for Ralph," said Nader campaign representative Chris Driscoll.

Nader has seen a big increase in the past two weeks in his online fundraising, and a recent CNN poll shows his support rising to 6 percent, small by electoral standards, but enough to deny Obama a crucial battleground state where the vote is close.

Nowhere is the anger level toward Obama more intense than in the blogosphere, the cyberspace world that has helped to raise hundreds of millions of dollars from more than 1.7 million donors and whose activists have been his biggest fans.

"There is a line between 'moving to the center' and stabbing your allies in the back out of fear of being criticized. And, of late, he's been doing a lot of unnecessary stabbing, betraying his claims of being a new kind of politician," said Markos Moulitsas, leader of the Daily Kos Web site, the bible of the liberal netroots community.

"Not that I ever bought it, but Obama is now clearly not looking much different than every other Democratic politician who has ever turned his or her back on the base in order to prove centrist bona fides," Moulitsas told his millions of readers last week.

To demonstrate his displeasure with Obama's flip-flops on core liberal issues, Moulitsas announced he was withholding his $2,300 contribution to the campaign. "I simply have no desire to reward bad behavior," he said.

The biggest complaint from the party's grassroots activists concerned Obama's support for a Bush-backed bill to give legal immunity to telecommunication companies helping the government intercept terrorist calls and e-mails.

Complaints were coming into Obama's Web site so heavily last week that he personally went online to explain his new position. He said that telecommunications surveillance was "a vital counterterrorism tool ... to keep the American people safe."

Donald Lambro

Donald Lambro is chief political correspondent for The Washington Times.