The 2020 primary with Colorado’s convenient mail-back ballot system and encouraging participation from the state’s largest bloc of unaffiliated voters exceeded the turnout in the competitive two-party race for governor in 2018 by more than 300,000 votes (1,171,000 in 2018). This year, only Democrats had a competitive race for senate, but still 565,000 Republicans voted for a total 1,577,347 votes (Secretary of State claims 1.6 voted, but a few have not been posted as of 3:00 pm, Wednesday, July 1). The state’s mail-back system can handle presidential-level turnout as it did in 2016 (2.6 million).
As of 3:00 pm Wednesday, 509,422 unaffiliated voters participated, with more than 300,000 voting in the Democratic primary. It made up much of the difference in the Republican and Democratic totals and points to the challenge Republicans will have in November if they can’t shift unaffiliated voters to a more even split.
This report will be updated as the Secretary of State releases more data.