Barack Obama rolled out three more superdelegate endorsements Wednesday, all of them coming from North Carolina and Indiana, which hold their Democratic primaries May 6.

North Carolina Representatives Mel Watt of Charlotte and David Price of Chapel Hill announced their support for Mr. Obama on a conference call with reporters.

“Only one candidate has marshaled this spirit of change into a movement that is completely inclusive, uniquely democratic and uniquely American,” said Mr. Watt, according to The Charlotte Observer. “That candidate is Barack Obama.”

Mr. Price dismissed the idea that Mr. Obama’s “bitter” comment would harm his candidacy. “Senator Obama was simply stating the obvious,” Price said, according to The Chicago Tribune.

Senator Obama is the Democrats’ best shot at carrying North Carolina in the general election, Mr. Price added. Mr. Obama is closing the gap on Hillary Rodham Clinton’s lead in superdelegates.

All the Democratic members of North Carolina’s congressional delegation previously supported fellow North Carolinian John Edwards for president. Reps. Price and Watt join Rep. G.K. Butterfield in supporting Mr. Obama.

“It comes as no surprise that two of the most liberal members of the North Carolina House delegation would embrace one of their own,” Linda Daves, chairwoman of the North Carolina Republican Party, said in a statement. “Of course a defender of earmarks would endorse a candidate who secured 53 pork projects last year costing the taxpayers $97.4 million.”

Mrs. Clinton has one Tar Heel superdelegate behind her, Susan Burgess of the Charlotte City Council.

In Indiana, Mr. Obama can count on the support of Representative Andre Carson of Indianapolis. The 33-year-old won a special election last month to fill the House seat after Representative Julia Carson — his grandmother — died.

Mr. Carson said in a news release that Mr. Obama “is part of a new generation of leadership that will bring needed change for our country.”

Senator Clinton, though, has an even newer addition to the House on her side. Jackie Speier has been a longtime Clinton supporter but only became a superdelegate last week when she won the seat formerly held by Representative Tom Lantos, who died in February.

“As a woman, a lawmaker and a mother, I understand what electing Hillary will mean for this country,” said Ms. Speier, who represents part of the San Francisco area, in a statement. “She will not only bring an extraordinary grasp of the issues to the White House, but also a uniquely feminine skill set — consensus building, negotiation, and patience — that will serve our nation well.”