Hillary Clinton appeared flustered Thursday when an attendee at a campaign event in New York state asked her if she would reject campaign donations from fossil fuel companies, responding by accusing rival Sen. Bernie Sanders’ (I-VT) campaign of spreading “lies.”

“I do not have—I have money from people that work for fossil fuel companies,” Clinton said, waving her finger at the woman who asked the question. “I am so sick, I am so sick of the Sanders campaign lying about me. I’m sick of it.”

Greenpeace posted video of that exchange online.

Sanders had tied Clinton to Wall Street and the fossil fuel industry earlier in the day at a rally in Wisconsin, according to local TV station WGRZ.

“We don’t represent Wall Street. We don’t represent the drug companies or the fossil fuel industry. We don’t want their money,” Sanders said at the rally.

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