Rep. Diana DeGette, Representing Colorado Congressional District 1

Rep. Diana DeGette (credit: Alex Wong/Getty Images)

Rep. Jared Polis, Representing Colorado Congressional District 2

Rep. Jared Polis (credit Chip Somodevilla/Getty Images)

Rep. Scott Tipton, Representing Colorado Congressional District 3

Rep. Scott Tipton (Photo by Chip Somodevilla/Getty Images)

Rep. Cory Gardner, Representing Colorado Congressional District 4

Rep. Cory Gardner (credit: Alex Wong/Getty Images)

Rep. Doug Lamborn, Representing Colorado Congressional District 5

Rep. Doug Lamborn (credit: Jose CABEZAS/AFP/Getty Images)

Rep. Mike Coffman, Representing Colorado Congressional District 7

Rep. Mike Coffman in March 2010 in Washington (credit: Brendan Hoffman/Getty Images)

Rep. Ed Perlmutter, Representing Colorado Congressional District 7

Rep. Ed Perlmutter in Denver in 2008. (credit: Mark Wilson/Getty Images)

Sen. Mark Udall

Sen. Mark Udall (credit: KAREN BLEIER/AFP/Getty Images)

Sen. Michael Bennet

Sen. Michael Bennet (credit: Doug Pensinger/Getty Images)