WATERLOO, IA - NOVEMBER 01:  Iowans stand and sing the national anthem during a campaign event for U.S. Senate Democratic candidate Rep. Bruce Braley (D-IA) at the Electric Park Ballroom November 1, 2014 in Waterloo, Iowa. The campaign event, the 10th annual 'Bruce, Blues & BBQ,' is the third time former President Bill Clinton has been in Iowa to support Braley during this election.  (Photo by Chip Somodevilla/Getty Images)