This is Colorado's first presidential all-mail ballot election. As we've previously reported, the mail ballots have changed Election Day from a sprint, to a three week marathon. The Colorado Secretary of State compiles ballot return data, which acts as a barometer for how the vote is getting turned out.
Read More: The Colorado Voter's Guide To The 2016 Election
Related: It Would Be Really Hard To 'Rig' Colorado's Election System
