In this Oct. 11, 2010, file photo, Kentucky Republican U.S. Senate candidate Rand Paul speaks during a debate with Democrat Jack Conway at Northern Kentucky University in Highland Heights, Ky. (AP Photo/David Kohl, File)

Photo by: David Kohl

In this Oct. 11, 2010, file photo, Kentucky Republican U.S. Senate candidate Rand Paul speaks during a debate with Democrat Jack Conway at Northern Kentucky University in Highland Heights, Ky. (AP Photo/David Kohl, File)