Beginning with Bill Clinton’s election in 1992, Colorado is the Mountain West state that has shifted positions the most between the two parties. New Mexico is the most Democratic-leaning western state voting Democratic tickets all six times.
Nevada is our closest neighbor in terms of being competitive, but leaning Democratic. It gave Clinton two narrow wins in the 1990s, supported Bush twice, and then provided big wins for Obama in 2008 (12 points) and 2012 (6 points).
Colorado voters can expect to see a lot of TV advertising in 2016.