Republicans and Democrats have long been concerned about how the vote will shake out in Arapahoe County — one of the key swing counties in an undecided state — and now they have one more thing to fear: an "I Voted" sticker.

More than 230,000 ballots last week were mailed to Arapahoe County's voters in envelopes that possibly contained a participation sticker that rubbed up against the ballot and in some cases left a faint, near-linear mark that appeared exactly where voters draw a line to select their candidates.

Arapahoe County Clerk and Recorder Nancy Doty said the marks are so faint that the scanning machine that tabulates the votes does not detect any of them. Read the rest of the story from the Denver Post HERE.