Last night, Hillary Clinton didn’t want to talk about a fundraiser hosted by fracking executives in January.

When the issue was brought up during the debate Sunday night, Bernie Sanders’ face said it all:

“On the campaign trail, Sen. Sanders often refers to a fundraiser in January that was hosted by executives from a firm that’s invested significantly in domestic fracking. Do you have any comment on that?” moderator Anderson Cooper said to Clinton.

“I don’t have any comment on that,” Clinton replied.

“I don’t know that,” she said, triggering a shocked and mystified look on Sanders’ face, before looking amused. “I don’t believe that there’s any reason to be concerned about it,” Clinton said as Sanders’ look transitioned to one of being stunned.

US Uncut reported in January:

On the eve of the first political contest of 2016, Hillary Clinton will be soliciting campaign funds from wealthy investment bankers at two separate Wall Street fundraisers.

Zaid Jilani of The Intercept is reporting that Clinton will be traveling to Philadelphia and New York City for private fundraisers hosted by financial titans Franklin Square Capital Partners and one of the top executives of BlackRock, respectively. The FS Energy & Power Fund — one of Franklin Square’s prominent investment funds — is primarily responsible for funding fracking and offshore oil drilling, meaning that much of the campaign money Clinton will be raising in Philadelphia will come indirectly from the fossil fuel industry. And as Mother Jones has previously reported, one of Clinton’s lasting legacies during her time as Secretary of State was the propagation of fracking around the world.