Sal Russo, co-founder, Tea Party Express
Reihan Salam, co-author, Grand New Party
Jack Pitney, political scientist, Claremont McKenna College
The remaining GOP presidential candidates, Mitt Romney, Rick Santorum, New Gingrich and Ron Paul, are all fighting to sell a slightly different brand of conservatism. Conservatism has undergone some big changes and its definition in 2012 continues to morph.