Strong early mail ballot returns in Colorado, exceeding 2022 midterm pace while trailing 2024 presidential levels, with over 1.33 million ballots returned by late October, anchor trader consensus around the 2.7M-2.85M turnout range. Universal mail voting, earlier ballot mailing under recent law changes, and roughly 4.07 million active registered voters support elevated midterm participation adjusted for population growth. Older voters account for the largest share of returns, while unaffiliated and younger cohorts show lower rates, and Democrats return ballots faster than their registration share. The low-salience Senate contest, rated safe Democratic, reduces national mobilization pressure relative to prior cycles.