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Sen. Rand Paul (R-Ky.) has a tongue-in-cheek suggestion for President Obama: Negotiate another prisoner exchange, but this time trade five senior Democrats for a U.S. Marine being held in Mexico.

Addressing the GOP convention in Fort Worth, Texas Friday, Paul said a delegate he had been chatting to had said, “There is one guy who is kind of deserving we ought to try to get home, and that’s the Marine who accidentally carried his guns into Mexico.”