Note: As an example, R+10 means that in an average year, “the Republican candidate for president will win 10 percent more of its vote there than he would in the country as a whole.” (Silver, Nate. (2011, January 18). Gaming Senate Fights in Connecticut and North Dakota. FiveThirtyEight. Retrieved June 6, 2016, from http://fivethirtyeight.com/features/gaming-senate-fights-in-connecticut-and-northdakota/.)