A white nationalist leader who helped organize the “Unite the Right” rally last year in Charlottesville, Va., was busted for allegedly attacking family members who confronted him about an affair.

Matthew Heimbach, a Holocaust denier at the helm of the hate group Traditionalist Worker Party, was nabbed Tuesday on domestic battery charges, the Indy Star reported.

Heimbach, 26, dubbed “the next David Duke” by the Southern Poverty Law Center, is accused of grabbing his wife’s cheeks and pushing her at the couple’s Paoli, Ind., home as their children stood nearby, court documents reviewed by the paper show.

The fight broke out after his wife and her stepdad, David Parrott — the party’s chief spokesman — confronted Heimbach about having an affair with Parrott’s wife, Jessica, the outlet reported.

It is unclear whether Jessica Parrott is related to Heimbach’s wife.

At one point during the brawl, Heimbach put David Parrott in a headlock and choked him unconscious, according to the court records.

On Tuesday, Parrott announced he was walking away from the group, telling the SPLC, “I’m done. I’m out.”

The two had formed the group together to protect the interests of white Americans who “for decades have been abandoned by the System,” according to their Facebook page.

Heimbach was freed on $1,000 cash bond.

He pleaded guilty in July 2017 to disorderly conduct for shoving a woman and shouting at her at a campaign rally for Donald Trump in Louisville, Ky.