As they traveled across Indiana and North Carolina over the last few days, trading charges and countercharges about the wisdom of suspending the federal gas tax for the summer, Senators Hillary Rodham Clinton and Barack Obama were really having a larger fight.

The two Democratic candidates for president are divided on whether to implement a gas tax holiday this summer.

Senator Hillary Rodham Clinton defeated Senator Barack Obama in the Ohio and Texas primaries on Tuesday, ending a string of defeats and allowing her to soldier on in a Democratic presidential nomination race that now seems unlikely to end any time soon.

Senator Hillary Rodham Clinton defeated Senator Barack Obama in the Ohio and Texas primaries on Tuesday, ending a string of defeats and allowing her to soldier on in a Democratic presidential nomination race that now seems unlikely to end any time soon.

Hillary Clinton refused to count herself out of the U.S. presidential race on Tuesday as her hard-fought duel with Barack Obama for the Democratic nomination rested with voters in Ohio and Texas.

Democrats Barack Obama and Hillary Clinton clashed sharply over health care in a debate on Tuesday, accusing each other of misrepresenting their approaches to offering coverage for 47 million uninsured Americans.

Intrade has done an excellent job of predicting election results over the last few years.  But now a little backlash has begun.

Fears a fight to the convention would make Democratic victory more likely

Boosted by his big night, John McCain asked his loudest conservative critics Wednesday to "calm down" and support his Republican presidential candidacy.

Wall Street sized up its options  in a U.S. presidential campaign likely to pit a Republican with a history of breaking party ranks against one of two Democrats seeking change.

Buoyed by voters embracing his message of change, Barack Obama took the Illinois Democratic  primary Tuesday, a victory that offered one of the richest delegate prizes.

The race for the Democratic presidential nomination remains tight after" Super Tuesday," while Sen. John McCain posts decisive results in the Republican race.

As the presidential candidates made their last-minute push before Super Tuesday’s contests in more than 20 states, Senators John McCain, Hillary Rodham Clinton  and Barack Obama focused their efforts on the delegate-rich Northeast on Monday, while Mitt Romney set off on a coast-to-coast swing that is to end with an evening appearance in California.

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Sen. John McCain won the Florida Republican primary on Tuesday, defeating rival Mitt Romney in a close contest that gave momentum to his effort to become the party's U.S. presidential candidate, U.S. media projected.