In a change from previous years, Custer, Fremont, Chaffee, with part of Lake, Park, Teller, and Jefferson County voters will go to the polls in a new Congressional District to choose a new representative in Washington for the first time in 16 years. Congressman Ed Perlmutter is retiring and is backing Democratic State Sen. Brittany Pettersen as his replacement. The newly-configured district stretches from Broomfield in the north to Custer County in the south. The race for the open seat, several political watchers say, is Democratic State Sen. Brittany Pettersen’s to lose, with Democrats having nearly 13,000 more registered voters than Republicans in the district. The 7th Congressional District, the lines of which were redrawn last year as part of the decennial redistricting process, is largely shaped by the…