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Republican presidential hopefuls arrive on stage for a debate in Myrtle Beach, South Carolina, January 16, 2012. South Carolina will hold its Republican primary on January 21, 2012. From left are: Rick Perry, Rick Santorum, Mitt Romney, Newt Gingritch and Ron Paul. AFP PHOTO / Emmanuel Dunand (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)
Republican presidential hopefuls arrive on stage for a debate in Myrtle Beach, South Carolina, January 16, 2012. South Carolina will hold its Republican primary on January 21, 2012. From left are: Rick Perry, Rick Santorum, Mitt Romney, Newt Gingritch and Ron Paul. AFP PHOTO / Emmanuel Dunand (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)

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La candidatura republicana

Con la salida de Rick Perry, quedan cuatro candidatos en la interna republicana a la presidencia de EE.UU.

La candidatura republicana

Con la salida de Rick Perry, quedan cuatro candidatos en la interna republicana a la presidencia de EE.UU.