More than 635,000 Colorado voters have returned their ballots for the Nov. 5 election, which features a faceoff between Vice President Kamala Harris and former President Donald Trump and a host of other races and ballot measures, according to data released by state elections officials Wednesday. RELATED: Colorado voter guide: Stories, explainers and endorsements for the 2024 election So far, Democrats have outpaced Republicans by about 22,000 ballots.