FILE - In this April 23, 2012 file photo, Sen. Marco Rubio, R-Fla. listens at left as Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks in Aston, Pa. Leaks

 

              FILE - In this April 23, 2012 file photo, Sen. Marco Rubio, R-Fla. listens at left as Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks in Aston, Pa. Leaks
FILE - In this April 23, 2012 file photo, Sen. Marco Rubio, R-Fla. listens at left as Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks in Aston, Pa. Leaks are springing. Trial balloons are floating. Egos are being stroked. Wanna-bes are auditioning. And, chances are, lies are being told. Somewhere, amid all of the shenanigans, Republican Mitt Romney is considering his choices for a running mate, one of the most significant decisions of his presidential campaign. (AP Photo/Jae C. Hong, File)