Zephyr Teachout wants to take on the billionaires head-to-head.

The Democratic 19th Congressional District candidate, known for her anti-big corporation and pro-public campaign financing rhetoric, on Monday challenged hedge funders Paul Singer and Robert Mercer to a debate as they help fund a super PAC that has helped support Republican John Faso.

“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.”

In a video, Teachout called out Singer specifically, asking him to debate on offshore jobs, Common Core and hydraulic fracturing.

Representatives for Singer and Mercer could not immediately be reached.

The Faso campaign barked back that Teachout is grandstanding.

“Having just moved into the district from NYC and registered to vote just seven months ago, Professor Teachout is not just a carpetbagger, but a grandstanding one as well,” Faso said in a statement. “She has no grasp of the everyday concerns of the people of this district. She wants to amend the First Amendment to give the government more control over political speech. She wants taxpayers to foot the bill on all elections, which would cost the public hundreds of millions of dollars each cycle. Prof. Teachout knows that she has the support of every leftist PAC and special interest group; she even has the support of the Communist Party, and she isn’t embarrassed by it either. What’s more, three quarters of her money is coming from outside the state. As a law professor, Teachout knows that candidates have no control over independent spending. Rather than discussing jobs and the upstate economy, she attempts to distract attention from her radical views. That is what NYC carpetbaggers do.”

The super PAC Teachout is referring to was set up in part by former state Sen. George Winner, who said in May that those behind New York Wins like Faso’s conservative background and aim to keep the 19th district seat Republican (Rep. Chris Gibson, a Kinderhook Republican, holds the seat but is not running for re-election). At the time, Winner said though the super PAC wasn’t involved in primaries outside of the 19th district (Faso beat fellow GOPer Andrew Heaney in June), there were plans to get involved in other races.

Mercer propped up the PAC with $500,000, and Singer has donated $600,000, according to Federal Election Commission filings. Investment fund partner and Sears Holding Corp. board member Thomas Tisch also donated $25,000 to the PAC, its July quarterly filing shows.

That July filing shows expenditures related to anti-Heaney literature and ads, but nothing opposing Teachout so far.