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A Hillary clinton backer's defection to the Barack obama camp tightens the race for superdelegates, who could determine which candidate will become the Democratic presidential nominee.

One of the hot topics on the presidential campaign trail this week has been whether to institute a gas tax holiday this summer. Both john mccain and Hillary clinton think it's a good idea. Barack obama doesn't. The proposal has pros and cons.

In a state where obama's once huge lead may be softening, the New York Senator is stepping up her efforts to close the gap

The Rev. Jeremiah A. Wright Jr., under fire for statements that have embarrassed Sen. Barack obama's campaign, has found staunch support in the pulpits of black churches around North Carolina. The people in the pews, however, are far less accepting.

Hillary Rodham clinton is rising in the polls while Barack obama is gaining ground among superdelegates who will decide the winner.

AP - Hillary Rodham clinton was jolted Thursday by the defection of one of her longtime superdelegate supporters, a former national party chairman who urged fellow Democrats to 'reject the old negative politics' and unify behind Barack obama.

While she has cut into obama's popular-vote lead as he has struggled this past month, he got a boost from a high-profile defection.

INDIANAPOLIS, May 1 -- With polls showing signs of erosion in his candidacy, Sen. Barack obama sought Thursday to shift the focus of the Democratic campaign away from the Rev. Jeremiah A. Wright Jr. and back to the economy and his dispute with Sen. Hillary Rodham clinton over her proposal to suspend...

AP - Turns out Louisiana and Mississippi weren't quite finished with the Democratic presidential campaign. Sen. Barack obama won each state's primary earlier this year. But these days his face still appears in television ads in both states, this time from Republicans trying to turn him into a liability for Democrats in two looming special elections for long-held republican seats.

Clinton calls for vote on gas tax holiday, obama dismisses it as 'shell' game