Rick Santorum says he's leaving the race for president, clearing the way for Mitt Romney to become the likely Republican presidential nominee. Santorum made the announcement in his home state of Pennsylvania, two weeks before the state's primary.

Rick Santorum says freedom and curbing big government's reach are the overriding issues in the presidential race. Despite his loss to GOP front-runner Mitt Romney in the Illinois primary, Santorum is pressing ahead with his campaign.

After victory in the Alabama and Mississippi primaries, Rick Santorum declares that only a conservative can beat President Barack Obama as he vows to take the fight for the Republican nomination "everywhere there are delegates."

Rick Santorum had a mixed night, racking up Super Tuesday wins in North Dakota, Oklahoma, and Tennessee, but losing out to Mitt Romney in the battleground state of Ohio.

Mitt Romney emerged from the Republican primary's biggest single-day contest with the most delegates, but perhaps not the momentum he would have liked. With seven of the day's 11 states likely in his pocket, Romney increased his delegate lead ove...

North America correspondent Jane Cowan reports from Ohio, one of the crucial states to going to the polls in the Super Tuesday Republican primaries.

Republican Presidential candidate Rick Santorum heavily criticized his chief rival, Mitt Romney, as well as President Obama, during a campaign stop in Miamisburg, Ohio. Ohio is one of the states holding a Super Tuesday primary tomorrow.

Republican candidate Mitt Romney has won presidential primaries in Michigan and Arizona, but concerns remain that he's not a particularly strong frontrunner in a nominating fight with no end in sight -- and one that is turning increasingly bitter ...

Republican frontrunner Mitt Romney edged out Rick Santorum in Michigan and Arizona in contests for party's presidential nomination. But the vote in the former Massachusetts Governor's home state was uncomfortably close. Al Jazeera's John Hendren r...

Former Pennsylvania Senator Rick Santorum has surged in the Republican presidential contest with wins in the Minnesota and Colorado caucuses, as well as a nonbinding primary in Missouri. Santorum's win appears to have been fueled by evangelical vo...