A conservative super PAC launched an ad campaign on Monday that uses domestic abuse allegations against Representative Keith Ellison, the Democratic nominee for attorney general in Minnesota, to attack other members of his party running for office in the state.

The ad, titled “Ashamed,” has been tailored to target several Democrats running for the House of Representatives and chastises them for not calling on Mr. Ellison, who is also the deputy chairman of the Democratic National Committee, to drop out of the race.

“Joe Radinovich is standing by Keith Ellison,” says one version of the ad, edited to focus on Mr. Radinovich, a former state representative running in Minnesota’s Eighth Congressional District. “Backing Ellison instead of believing his victim? Joe Radinovich should be ashamed.”