FILE - In this April 23, 2014, file photo, Republican senatorial candidate Thom Tillis responds during a televised debate at WRAL television studios in Raleigh, N.C. The struggle for control of the Republican Party is getting an early voter test in North Carolina, where former presidential nominee Mitt Romney and tea party favorite Rand Paul on Monday, May 5 pushed their own candidates for the right to challenge Democratic Sen. Kay Hagan in November.(AP Photo/Gerry Broome, Pool)