This combination of 2013 file photos shows, from left, top row, Sen. Rand Paul, R-Ky. and Sen. Marco Rubio, R-Fla. and bottom row, Sen. Ted Cruz, R-Texas and former Florida Gov. Jeb Bush. Pivotal ... more 
This combination of 2013 file photos shows, from left, top row, Sen. Rand Paul, R-Ky. and Sen. Marco Rubio, R-Fla. and bottom row, Sen. Ted Cruz, R-Texas and former Florida Gov. Jeb Bush. Pivotal developments on two cultural issues - immigration reform and gay marriage - offer an early preview of potential fault lines among Republicans weighing White House bids in 2016. (AP Photo) less 
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Associated Press
Tue, Jul 2, 2013 3:45 AM EDT