I predict a “Ken Bone was here” sign forthwith in Wausau and at least a 12% increase in tourism to that fair city.

When you answer the door for Halloween, don’t be surprised if Ken Bone shows up, or at least someone who is dressed like him.

The 34-year-old, who works for a coal-fired plant in Southern Illinois, stood out among the audience at Sunday night’s presidential debate — so much so that he seems to have sparked a fashion movement: The distinctive red Izod sweater he was wearing at Washington University in St. Louis is sold out in every size from small to extra large this afternoon on Amazon.

Before the debate, Bone had 7 Twitter followers, including two accounts opened by his grandmother, he said. By 6 p.m. ET, his @kenbone18 account had 36,300.

Bone told ABC News that he had planned to wear an olive suit to the debate, but as he got in his car on Sunday morning, his pants split down the seam. The replacement? Cargo khakis with pockets and his red sweater that he bought in a pinch when he traveled to his only nephew’s baptism a couple years ago and the shirt he brought didn’t fit him.

“I bought it at a Kohl’s in Wausau, Wisconsin,” Bone said of the red sweater.