National Democrats are going after San Antonio-area congressional candidate Maureen Galindo, placing a last-minute ad buy against her amid backlash over antisemitic comments she made on social media.

The spot, which began airing Friday ahead of Tuesday’s primary runoff, dubs Galindo “MAGA Maureen,” highlighting what they say is Republican meddling in the race after a super PAC with suspected GOP ties began boosting her with supportive ads earlier this month. It’s paid for by the Democratic Congressional Campaign Committee, and is the group’s first spending in the runoff, totalling $34,000.

The group is hoping to prevent her from becoming the party’s nominee in a competitive seat that includes much of southern Bexar County. National Democrats have lined up behind Galindo’s challenger, former sheriff’s deputy Johnny Garcia, whom they see as the party’s best chance to retain a district that Republicans redrew to lean in their favor.

Galindo, a family therapist who describes herself as progressive, came in a narrow first during the March primary with 29% of the vote. She later came under fire for comments on Jews and Israel, including the notion that people who identify as Jews today are not the Jews of the Bible and that the U.S. Department of Homeland Security is based in Tel Aviv.

Leaders including House Minority Leader Hakeem Jeffries and U.S. Rep. Greg Casar, D-Austin, began condemning the remarks last week and endorsing Garcia. Galindo doubled down last weekend, writing in an Instagram post she would seek to convert an immigrant detention center near San Antonio into a “prison for American Zionists and former ICE officers.”

Asked for comment, Galindo pointed to a statement posted on her campaign website that states the prison would be “for the billionaire zionists who have profited off genocidal prison state materials and trafficking.”

“Prosecution has nothing to do with religion – they could be Evangelical, Catholic, Mormon, Jewish, etc.,” it says.

The winner of the runoff will face the GOP nominee, who will either be state Rep. John Lujan of San Antonio or businessman Carlos De La Cruz.

“House Republican leadership must immediately cease propping up this antisemitic candidacy, pull spending in the race and forcefully condemn these comments,” DCCC spokesperson Madison Andrus wrote in a statement earlier this week.