As It Happens

Secret Service agents quickly apprehended a man who possibly attempted to "glitter bomb" Mitt Romney.

CNN's Anderson Cooper talks to a panel of political experts about Rick Santorum's acceptance speech.

The Colorado GOP chair declares that Rick Santorum has won Colorado.

First lady Michelle Obama takes on late night TV host Jimmy Fallon in a fitness challenge.

Ron Paul says they will push ahead in the GOP race regardless of Tuesday's caucus and primary outcomes.

Republican presidential candidate Newt Gingrich tells CNN's Wolf Blitzer he is focused on running a nationwide campaign.

Presidential candidate Mitt Romney addresses his followers after losing both Missouri and Minnesota to Rick Santorum.

Presidential candidate Rick Santorum argued that opponent Mitt Romney wanted to be a senator but lost the race.

President.Obama was a critic of super PACs, but now his campaign encourages donors to give to them.

Rick Santorum says conservatives see him as the best choice to beat President Obama, and that his fundraising proves it.

Rick Santorum responds to criticism from Donald Trump on his previous loss in a race for office in Pennsylvania.

Lawmakers in Washington State voted 55-43 Wednesday in favor of a bill that would legalize same-sex marriage.

CNN said Wednesday it has suspended political analyst Roland Martin for "regrettable and offensive" Tweets written during the Super Bowl that critics said appeared to call for violence against gays.

GOP presidential candidate Rick Santorum responds to challenges by Mitt Romney on his record in Congress.

GOP presidential candidate Rick Santorum says he is the conservative alternative to President Obama.

Coming off a drubbing by Rick Santorum, Newt Gingrich plans to head to home turf as part of his strategy to revitalize his presidential bid in next month's Super Tuesday primaries.

CNN's Dana Bash talks with GOP presidential hopeful Rick Santorum about his victories in Missouri and Minnesota.

Rick Santorum awoke to a new reality Wednesday after sweeping all three Republican presidential contests a day earlier, reshaping the contest that will decide who runs against President Obama in November.

Rick Santorum awoke to a new reality Wednesday after sweeping all three Republican presidential contests a day earlier, reshaping the contest that will decide who runs against President Barack Obama in November.

John Avlon says the low GOP voter turnout in the primaries is a sign of a serious enthusiasm gap among the rank and file, and a bad omen for Mitt Romney and Republicans in general.