"Who's funding the super PAC?" he shouted.
He was referring to Progress in PA-05, an outside group that is backing Lunkenheimer in the primary for Pennsylvania's Fifth District — and that can spend unlimited amounts of money as long as it doesn't coordinate with her.
At the debate, Lunkenheimer suggested that she knew three people who donated to the super PAC, saying they told her "they believe so much in the importance of this race and my candidacy that they would like to provide additional support." But she didn't name them, which led to criticism from some progressives.
Now, Lunkenheimer is disclosing one of the super PAC's funders to Clout: It's her mother, Molly Shepard.
She added that she wants to end Citizens United and overhaul the country's campaign finance laws.
Shepard is a powerful figure in the region. She is the CEO of the executive-coaching firm The Leader's Edge, and has sat on the board of a number of local nonprofits.
So far, the pro-Lunkenheimer super PAC has spent $56,000 on mailings in support of her, according to campaign finance filings.
Shepard has not responded to requests for comment about the super PAC supporting her daughter. The committee's treasurer also has not returned our calls.