The Minnesota congresswoman ends her presidential run after a disappointing finish in Iowa.
Rick Santorum supporters marked their candidate's surprise Iowa finish with a subdued celebration.
In Romney-Santorum match-up, a fight for the soul of the GOP
The former senator from Pennsylvania gives the presumptive GOP nominee a run for his money.
The GOP candidates make a last-ditch pitch to high-school students at a Rock the Vote event.
Why Rick Santorum’s momentum could lift him to victory in Iowa
Meet the lawyer on a crusade to topple all limits on the role of money in politics.
Iowa's process for selecting party nominees is convoluted and hardly representative, but it has the value of being first.
A day before the caucuses, the media turns their attention to the mysterious undecided voter.
Rick Santorum's campaign is taken aback by the candidate's newfound popularity.
Occupy protesters take on Iowa.
Michele Bachmann's Iowa campaign chief defects to the Ron Paul camp.
Mitt Romney learned some lessons from his failed 2008 presidential bid.
What will the DOJ’s rejection of South Carolina's voter-identification law mean?
Community groups launch billboard ad campaigns that urge compassion for the undocumented.