9. Maryland’s 6th congressional district – MD6
Percentage of the voters that voted for the winner in the last elections: 49.7
Maryland’s 6th congressional district was created in 2011 by Gov. Martin O’Malley (D), by adding few democrat-heavy communities to other ways rural district, held by the Republicans. The effect was almost instantaneous and in 2012 incumbent Republican representative Roscoe G. Bartlett lost or Democrat John Delaney by almost 20% margin. He didn’t fare so well in 2014 when he barely held to his seat with 49.7% opposed to his opponent’s 48.2.