WASHINGTON, DC - JANUARY 20: U.S. Sen. Joni Ernst (R-IA) practices the Republican response she will give after U.S. President Obama's State of the Union address, on Capitol Hill January 20, 2015 in Washington, DC. Later this evening U.S. President Barack Obama will deliver his sixth and final State Of The Union adress to the nation. (Photo by Mark Wilson/Getty Images)
