Often a candidate will challenge their opponent to debating their policy differences, but Democrat Zephyr Teachout has a different angle: She wants to debate the donors supporting Republican John Faso.

Even if the challenge goes unaccepted, it’s a way of drawing attention to those who are funding a super PAC that has supported Faso, namely billionaires Paul Singer and Robert Mercer.

Both men — who have drawn the ire of liberals for their support of conservative causes and candidates — have contributed a combined $1 million to the New York Wins PAC.

“The voters deserve to hear directly from the billionaires backing John Faso about what they expect to get from him in Congress,” Teachout said in a statement. “When someone writes a $500,000 check they don’t do it out of the goodness of their heart. These are people probably trying to buy power, and voters should know who they are and what they stand for. I’m challenging Paul Singer and Robert Mercer to put your mouth where your money is and debate me directly, not through your mouthpiece.”

Teachout herself has rejected super PAC spending in support of her own campaign.

A key policy issue for Teachout has been overhauling campaign finance laws both on the state and national level, having written and studied on the topic as a Fordham Law School professor.

Both Teachout and Faso are competing for the 19th congressional district in the Hudson Valley, which is being vacated by Republican Rep. Chris Gibson this year.