(The Center Square) – The two candidates running for Congress in western Wisconsin are now at odds over political advertisements allegedly created by artificial intelligence.

Democrat Rebecca Cooke announced that she has sent Republican Congressman Derrick Van Orden a cease and desist letter over an ad that she claims defames her.

"Counsel for Cooke for Congress sent a cease and desist letter to Derrick Van Orden directing him to stop producing defamatory and false AI deepfake videos and publicizing them through his social media accounts. The cease and desist letter comes as Van Orden, who has posted many such videos over the past several months, continues to publish AI deepfake videos of his opponent, Rebecca Cooke, ahead of the November 3 election," Cooke's campaign said in a statement.

The letter specifically calls out an AI video that Van Orden posted in August that shows Cooke campaigning with former President Joe Biden.

The video claims Cooke said she wants “to take advantage of as much corruption as possible and give every illegal alien free healthcare.”

“Ms. Cooke never made the statements attributed to her. She does not support, and has never supported, the positions ascribed to her in this deepfake. You are airing this false content to attempt to fool the voters of Wisconsin into believing she said something she did not to harm her reputation for your own political gain,” Cooke lawyers wrote.

Van Orden responded with a new video of a duck walking next to a pond quaking "cease and desist."

He also responded to Cooke's letter with a post on X.

"We have her cold busted lying repeatedly and putting $1,000,000’s behind the lies on ads. She had no shame and cannot be trusted," Van Orden wrote. "After further consideration, I am demanding a pony and a jaunty hat as compensation."

The race between Van Orden and Cooke has been tense and feisty for months, with both sides accusing the other of lying.

The western Wisconsin district is the closest race for congress in the state, and Democrats see Cooke as a chance to flip the seat from Republican to Democrat.

Cooke's lawyer said if the AI ads continue, they will "evaluate all legal options to address that misconduct."