The Fans Want to Watch Football. Trump and Walz Will Be There, Too.

For college football fans, they are temples of the sport: the University of Alabama’s Bryant-Denny Stadium and the Big House at the University of Michigan.

But to the presidential campaigns, they are this Saturday’s soundstages: ready-made stops for former President Donald J. Trump and Gov. Tim Walz of Minnesota, the Democratic nominee for vice president, to try to prove their Everyman mettle to any battleground-state voters who might be in the stands or watching from afar.

“College football in the fall is the only place where you can find 100,000 potential voters in one location and you don’t have to pay for it,” said Angi Horn, a Republican strategist and Alabama football loyalist.

“To pay for the amount of coverage and publicity and a crowd like that would cost millions,” she added. “They’re getting it for free — and you get to see a really good football game.”

Mr. Trump is headed to Tuscaloosa, Ala., where the second-ranked Georgia Bulldogs, the gridiron pride of the neighboring swing state, will meet the No. 4 Alabama Crimson Tide. Mr. Walz is scheduled to visit Michigan Stadium in Ann Arbor, trawling for votes in one of the country’s biggest battlegrounds as the 12th-ranked Michigan Wolverines, last season’s national champions, host Minnesota’s Golden Gophers.

Mr. Trump and Mr. Walz cannot reliably assume they will be Saturday’s star attractions as the campaigns encroach on a sport that is a cultural mainstay and surpasses Washington for ancient feuds and partisan obsessives. But their visits have been designed to invite a crush of local news coverage and social media posts and, their allies hope, cameos during national broadcasts that will soak up viewers in Michigan and Georgia.