Donald Trump is encouraging his Colorado supporters to vote in person instead of relying on Colorado's vote-by-mail system.
Trump told rally-goers in Greeley that they should head to a local polling place to pick up new ballots instead of using the ones they received by mail.
"They'll void your old ballot and give you a new ballot and you can go ahead and make sure it gets in," Trump said.
The Republican candidate has been suggesting -- without evidence -- that ballots sent by mail might not be counted, as part of his larger allegations about the election being "rigged" against him. Trump repeated the claim he made in Golden to volunteers at a phone bank before the rally at the University of Northern Colorado, saying, "The one thing I worry about is the ballots."
But some Trump supporters are pushing back.
Volunteer Skip Carlson told Trump before the rally that the vote count in the district will indeed be honest.
"We're all Republicans here,” Carlson said.