President Trump used a Saturday rally in Vandalia, Ohio, to take on one of the newest issues in American politics: the giant data centers that power artificial intelligence. "You can't turn them off or they go to China," he told the crowd at Butler High School, according to NBC News and Spectrum News.

Trump was in Ohio to boost Republican Sen. Jon Husted and Vivek Ramaswamy, the party's nominee for governor. He praised Husted's Ratepayer Protection Act, a bill meant to keep tech companies from passing the cost of new power plants and power lines on to regular customers, The Hill and the Boston Globe reported.

Ohio is a hot spot for data centers. Tech companies are building huge server farms in central Ohio, drawn by land, water and power lines. Those buildings use as much electricity as small cities. Utilities say they need new plants and grid upgrades to keep up, and households worry they will foot the bill.

Polls show the issue cuts against Republicans in the state for now. A New York Times/Siena poll found Ohio voters trusted Democrat Sherrod Brown more on AI and data centers by 10 points. Brown leads Husted 49% to 46% in that survey.

The fight is not limited to Ohio. In Minnesota, the attorney general has raised concerns about a proposed data center near Pine Island, and NPR has reported on rising bills in several regions with heavy data-center growth.

Some background: electricity demand in the U.S. was flat for about 15 years before AI took off. Now forecasters expect it to climb for years. Who pays for the new supply, tech firms or households, has become a key question for regulators.

The Ohio rally also featured former NFL coach Jon Gruden, a nod to the state's football fans.

What we know: Trump defended data centers and endorsed Husted's ratepayer bill.
What we don't: Whether that bill can pass, and how much bills will rise in Ohio.