President Trump, who has denounced N.F.L. players’ protesting racial injustice by refusing to stand during the anthem, has long been involved with the McMahons and W.W.E. Linda McMahon, Vince’s wife, was appointed by Trump to run the Small Business Administration.

Trump has hosted wrestling events at his properties and has been involved in the showmanship, once shaving McMahon’s head in the middle of a ring. Trump was also involved in an alternative professional league in the 1980s, owning the New Jersey Generals of the short-lived United States Football League.

But McMahon said that he had not consulted with Trump about the XFL, and that the ban on politics during games would extend to the president’s positions.

“Democrat, Republican, Independent, I don’t care, and no one should,” said McMahon. “We come to the field not to state what I am pro or against, that’s not why we’re there. We are there to play football.”

This XFL also won’t be affiliated with wrestling, at least not officially. McMahon has formed Alpha Entertainment to run the league with completely separate management. He recently sold off about $100 million in W.W.E. stock to fund it.

“I am very committed to this, and it’s going to take more than $100 million to do this league,” he said.

McMahon did not further estimate what amount of capital — including media rights fees, ticket sales and sponsorships — would be required to start the league. He said that he was not actively seeking other investors and that the league was already fully funded.