“This is my first experience in politics,” she said. “Just jumping right into the fire.”

She added that if Mr. Hof’s primary victory inflates voter turnout in November, it could work in her favor. “I don’t think party lines are going to be as big of an issue as they would normally be,” she said.

Like the president, Mr. Hof has been accused of sexual assault. At least two women have come forward publicly, but no charges were brought against him because the statute of limitations ran out. Mr. Hof has denied the allegations. “I’m around 540 girls in a very sexually charged environment at all times,” he said. “Sex is not a problem for me, and I would never be involved in anything like that.”

Mr. Hof published a book called “The Art of the Pimp” in 2016 and was the star of the HBO television series “Cathouse,” which focused on the Moonlite Bunny Ranch, his brothel east of Carson City. In 2015 Lamar Odom, the former N.B.A. forward who married the reality television star Khloé Kardashian, was hospitalized after he was found unconscious at another brothel owned by Mr. Hof.

Mr. Hof’s victory came amid debates over whether prostitution should be outlawed in Nevada — the only state in the country where it is legal. “The religious right needs to know it’s not going away,” Mr. Hof said of prostitution, adding that attempts to ban things like alcohol, marijuana and prostitution only drive the industries underground and allow criminals to thrive.

In addition to championing lower taxes, he said he would defend the Second Amendment and the rights of private well owners in his district.