HARRISBURG, Pa. (AP) — Democrat Paige Cognetti is taking a shot at artificial intelligence data centers in her challenge to freshman Republican Rep. Rob Bresnahan, saying “we’re not for sale” in a new TV ad in a swing Pennsylvania congressional district where communities are fighting data center projects.

The race between Cognetti, the mayor of Scranton, and Bresnahan is considered one of the Democratic Party’s best opportunities to pick up a seat in the November election in its bid to take control of the U.S. House and block President Donald Trump’s agenda.

Cognetti is airing the ad in a district that’s been buffeted by AI data center projects and as the opposition to data centers that has upended races for local offices across the country is spreading to top-of-the-ticket contests.

Speaking to the camera, Cognetti invokes the region’s industrial heritage as a coal and shale gas powerhouse, saying, “Big companies have come before, taken what they wanted and left us with their mess to clean up. Now it’s data centers.”