For Fry and many other Trump supporters, the concern over the election’s legitimacy is tied to the largely unproven claims Trump has raised about potential fraud involving millions of mail-in ballots that already have begun to pour in to election office across the nation.

“We would be foolish to not at least accept that it’s a real thing that happens sometimes, and I just worry that it’s going to happen in a greater numbers this year,” said Fry, a Marine veteran who owns a dental management company in Blanchester, Ohio. “And a lot of my friends think the same things.”

For Edelman and other Biden supporters, the worry is that Trump’s unrelenting criticism of the mail-in ballots and his refusal to agree to a peaceful transition of power if he loses is proof that he’ll stop at little to reverse what Edelman believes will be an electoral defeat given polls showing Biden with a significant lead nationally.

“Trump is already casting doubt on the legitimacy of vote by mail which tells me that he may try to dispute the result legally or by decree or who knows by what means,” said Edelman, an assistant to the learning specialist at a local school who backed Sen. Bernie Sanders in the primary. “He’s a liar. He will promote baseless conspiracy theories if he feel it will benefit him politically.”