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.

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.

Before the polls even opened in Wisconsin on Tuesday, the two Democratic contenders had moved on to campaign in Texas and Ohio, the two next big prizes on the primary calendar.

With big wins in hand, Democrat Barack Obama pointed on Wednesday toward critical showdowns with rival Hillary Clinton next month that could prove decisive in their heavyweight presidential battle.

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

Sen. Barack Obama easily won Democratic primaries Virginia and Maryland on Tuesday and reached out for another in the District of Columbia in a determined drive to erase Hillary Rodham Clinton's delegate lead in the party's presidential race.

Senator Barack Obama defeated Senator Hillary Rodham Clinton in the Maine caucuses on Sunday, giving him his fourth victory this weekend as he headed into three more state contests on Tuesday.

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.

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.