DAVENPORT, IOWA - OCTOBER 11: Republican state Sen. Joni Ernst debates U.S. Rep. Bruce Braley (D-IA) at the Galvin Fine Arts Center on October 11, 2014 on the campus of St. Ambrose University in Davenport, Iowa. The two are engaged in a closely contested senate race to filll the seat of U.S. Senator Tom Harkin (D-IA) and is considered to be one of the key races to determine control of the U.S. Senate. (Photo by David Greedy/Getty Images)
