<b>Full coverage:</b> Rick Santorum
Charlie Riedel / Associated Press
Rick Santorum
Fmr. Pennsylvania senator | Age 53
Declared June 6, 2011
A hero to many on the right for his social and fiscal conservative stances, Santorum will have to battle and outshine better-known Republicans — including several who carry the hard-right conservative banner.
He badly lost his 2006 Senate reelection bid in Pennsylvania, an important swing state, raising questions about his chances nationwide.
Santorum is married with seven children.
— Associated Press