Rick Santorum has picked up a last-minute endorsement in Nevada from Sharron Angle, a popular Tea Party figure who ran unsuccessfully for the U.S. Senate in 2010. How much will Angle's backing help Santorum's struggling campaign?

Mitt Romney has been declared the winner of the Florida primary, restoring much of the momentum he lost to Newt Gingrich in South Carolina.

Newt Gingrich is the Republican establishment's worst nightmare -- and not because they disagree with his positions.

A Suffolk University poll released late Wednesday showed Mitt Romney with a major advantage over Newt Gingrich in the general election, undermining the idea coming out of South Carolina that Gingrich is more electable against Barack Obama.

Newt Gingrich and Mitt Romney are in a dead heat in Florida. Charles Zelden, a historian at Nova Southeastern University in Fort Lauderdale, Fla., and an expert on elections, outlined who has the edge and what factors will determine the outcome of next Tuesday's primary.