Republican Senate candidate Joni Ernst laughs during a campaign stop in Council Bluffs, Iowa, Friday, Oct. 31, 2014. Ernst isRead More →

Republican Senate candidate Joni Ernst laughs during a campaign stop in Council Bluffs, Iowa, Friday, Oct. 31, 2014. Ernst is running against Democrat Bruce Braley for the Senate seat of Tom Harkin, who is not seeking reelection. (AP Photo/Nati Harnik)