DENVER — With just a day until Super Tuesday, Democratic presidential hopefuls Pete Buttigieg and Amy Klobuchar have ended their campaigns.
Klobuchar was planning to return to Denver to hold another campaign rally on Monday afternoon at Mile High Station, but the event was canceled shortly after announcing the end of her run. Some of the rally attendees did not find out about the cancelation until they arrived at the venue, but making things more complicated -- some did not find out until after they already voted for her.
As of late Monday afternoon, more than 1,226,276 Colorado voters have already turned in their mail-in ballots, according to Secretary of State Jena Griswold.
Karen and DeWayne Drummond are among the people who have already voted.
"I mean, we did mail them in right away because we were 100% behind Mayor Pete," said DeWayne Drummond.
They won't be able to change their vote to someone else, according to the Denver Elections, which said some people had asked for the ballots back.
"You know, they won't mean anything, so. I would prefer to be able to have, to voice our opinion on the remaining candidates," said DeWayne Drummond.
For the first time in more than 20 years, Colorado is holding a presidential primary instead of a party caucus. It's the result of Proposition 107, which was passed by voters in 2016.
With the new system, DeWayne Drummond said next time they might wait until closer to election day to vote.
"I think I'd hold it till the end next time," he said.
WHY CAN'T I VOTE AGAIN IF THE PERSON I VOTED FOR DROPS OUT?
It's too late to mail ballots, but you have until 7 p.m. on Tuesday, March 3 to drop them off or vote in person.
If you planned to vote for Buttigieg or Klobuchar and already filled out your ballot but have not yet turned it in then you can draw a line through the initial candidate -- then fill in the circle next to the person you want to vote for.
You also have the option to vote in person with a new ballot, but again those are only for voters who filled out a ballot and had not yet turned it in.
But what if you did turn it in and want a second chance at your vote?
Sorry. You can't.
Colorado voters get three weeks to cast their ballots. That's one benefit of mail-in voting. Having candidates drop out before the actual Election Day, but after having turned in your ballot, is not a benefit.
"It's Democracy. Democracy's a messy business," said Denver Clerk and Recorder Paul Lopez. "Once a ballot is cast, it is cast. Once you voted and you turned that in, you voted."
With all the technology out there, you'd think maybe your vote could be tracked and corrected. Actually, it's probably a good thing that it can't be.
"One of the core things in making sure an election is transparent and it's fair, is making sure that there's voter anonymity," said Lopez.
When a voter's ballot and envelope are received by their county clerk, the envelop bar code gets scanned. That's the only identifying information about the voter. It's scanned to record the voter as having voted. Once it's scanned, the ballot inside is taken out and put into a different pile. From then on, it's not known whose ballot is whose or who any one person voted for. There is no identifying information on a ballot (bar code, ballot number) that can connect the ballot to a specific person.
WATCH: You can't vote again if your candidate dropped out
Only Michael Bennet and John Delaney have submitted the required paperwork to officially withdraw as candidates in Colorado. Candidates including Buttigieg, Klobuchar, Cory Booker, Marianne Williamson, Andrew Yang and Tom Steyer have not, and will still have their votes counted.
It could matter.
If any candidate receives 15% or more, they will receive delegates, even if they dropped out of the race.
RELATED: A look at ranked-choice voting
Colorado Democrats have 67 delegates to award on Super Tuesday. Of those 67, 23 are state delegates and 44 are based on Congressional District. The 23 delegates will be awarded proportionally based on the state's results for any candidate who receives 15% or more, except candidates who have dropped out are not eligible for these delegates. The 44 Congressional District delegates will be divvied up proportionally based on how candidates do in each of Colorado's seven Congressional Districts. Candidates who have dropped out can receive Congressional District delegates.
Delegates award by Congressional District:
- CD1: 9 delegates
- CD2: 9 delegates
- CD3: 5 delegates
- CD4: 5 delegates
- CD5: 4 delegates
- CD6: 6 delegates
- CD7: 6 delegates
Colorado's 13 Democrat superdelegates can choose to vote from whomever they want.
WATCH: Why Buttigieg, Klobuchcar leaving Colorado primary helped Biden
SUGGESTED VIDEOS: Politics