On November 8, Colorado voters will vote on Initiative 140, which would create presidential primaries for parties that polled at least 10% of the vote in the last election. Here is the text. Independent voters could vote in either major party’s primary. However, members of other parties would not be permitted to change their party registration on presidential primary date for the purpose of receiving a particular party’s primary ballot. The presidential primary would be in March. The two major parties would set the date within March, assuming they agree.