These 12 battleground U.S. Senate races take place in a country deeply discontented with the state of the country, all national leaders, and political parties. With 10 of 12 seats held by Democrats but won by Romney by 8 points in 2012, this will be a competitive year to be sure. Nevertheless, Democratic incumbents and challengers are out-performing Obama in these states, while Democratic intensity matches that of Republicans, and the U.S. Senate vote numbers suggest the parties could well split these seats, putting the Senate at close to 50 for either party.