"We're hearing from people in our call center," said Keith Bansemer, the vice president of marketing at MyPatriotSupply.com, which sells emergency rations. "People feel like they've lost control of the election process. So they're taking matters into their own hands — those things they can control. I think there is apprehension with both top candidates."

A recent story in The New York Times echoed these concerns?—?specifically, the belief on the part of many Donald Trump supporters that a victory by Hillary Clinton could spark a war in the United States.

Just in case all Hell breaks loose on Nov. 8, many doomsday preppers are stocking up on emergency survival food including military Meals Ready to Eat, which boast decades-long shelf-lives.