Republican U.S. Sen. Mark Kirk, right, and Democratic U.S. Rep. Tammy Duckworth, left, face off in their first televised debate in what's considered a crucial race that could determine which party controls the Senate, Thursday, Oct. 27, 2016, at the University of Illinois in Springfield, Ill.
Republican U.S. Sen. Mark Kirk, right, and Democratic U.S. Rep. Tammy Duckworth, left, face off in their first televised debate in what's considered a crucial race that could determine which party controls the Senate, Thursday, Oct. 27, 2016, at the University of Illinois in Springfield, Ill. Seth Perlman AP
Republican U.S. Sen. Mark Kirk, right, and Democratic U.S. Rep. Tammy Duckworth, left, face off in their first televised debate in what's considered a crucial race that could determine which party controls the Senate, Thursday, Oct. 27, 2016, at the University of Illinois in Springfield, Ill. Seth Perlman AP