Adam Gabbatt of The Guardian newspaper holds images of possible Republican candidates, from left, former Pennsylvania Sen. Rick Santorum, former Alaska Gov. Sarah Palin, Sen. Ted Cruz, R-Texas, Wisconsin Gov. Scott Walker, Donald Trump, New Jersey Gov. Chris Christie, Sen. Marco Rubio, R-Fla., former Florida Gov. Jeb Bush, Sen. Rand Paul, R-Ky., and, former Texas Gov. Rick Perry, bellow, as he interviews Howard "Cowboy" Woodward during the Conservative Political Action Conference (CPAC) in National Harbor, Md., Thursday, Feb. 26, 2015. AP