Sixth District Congressman Mike Coffman (R) already has a Democratic challenger for his reelection bid in 2014. Former statehouse speaker and one time Senate candidate Andrew Romanoff officially entered the race over the weekend.
For the 6th Congressional district, the big game changer is Aurora. In redistricting, the new boundaries take out a big chunk of Republican Douglas county to the south and replaced it with the more working class and Democratic north Aurora.