The Surprisingly Unrepresentative 2014 Senate Map By Kyle Kondik
This map shows the 2014 Senate races in blue and red, with the states sized according to their population and colored based on their current occupant. (The gray states are those with no regular Senate election this year.)
Senate Class 2, the one contested this year, is far less representative of the nation as a whole than the two other classes. Its 33 states contain slightly more than half (51.8%) of the nation’s population. Class 1 (the 2012 class) also features 33 states, but those states host three-quarters (75.2%) of the population; Class 3, coming in 2016 with 34 states, is similar to Class 1, with 72.6% of the population.