THORNTON, CO - OCTOBER 15: (L-R) U.S. Rep. Ed Perlmutter (D-CO) introduces U.S. Sen. Mark Udall (D-CO) as they speak to campaign workers at the Thornton field office on October 15, 2014 in Thornton, Colorado. Udall is running for re-election against U.S. Rep. Cory Gardner (R-CO) in the November 4, 2014 Senatorial election and Perlmutter is seeking re-election against Repuplican Don Ytterberg in the Congressional race. (Photo by Doug Pensinger/Getty Images)
