Despite a weak showing in Tuesday's U.S. Democratic presidential primaries, Sen. Hillary Clinton of New York said Wednesday that she will remain in the race "until there's a nominee."

U.S. Democratic presidential candidate Senator Hillary Clinton (D-NY) with her husband, former President Bill Clinton (L) speaks to supporters at her North Carolina and Indiana primary election night rally in Indianapolis, Indiana, May 6, 2008.

Speaking to reporters in Shepherdstown, W.Va., the former first lady did not make it clear whether that meant through the roll call of the states at the Democratic National Convention this summer.

Meanwhile, Democratic presidential front-runner Sen. Barack Obama of Illinois picked up the support of at least four convention superdelegates Wednesday, building on the momentum from his strong showing Tuesday.

He was home in Chicago during the day as his aides spread word that he would soon begin campaigning in states likely to be pivotal in the fall campaign.

They also relayed word of the four endorsements, expected to be made public later in the day.

In Tuesday's primaries, Obama beat Clinton 56-42 percent in North Carolina as Clinton scored a 51-49 percent win over Obama in Indiana.

The overall impact of the two contests is to expand Obama's lead in delegates without fundamentally altering the nature of the race.

Obama now has 1,842 delegates to 1,646 for Clinton in CNN tally. It takes 2,024 delegates to win the nomination in Denver this summer.

(Xinhua News Agency May 8, 2008)