April 2, 2016 10:08 AM EDT

SHEBOYGAN, Wisconsin — Senator Bernie Sanders said that his Democratic presidential primary opponent former Secretary of State Hillary Clinton owed him and his campaign an apology Friday evening over an ongoing spat about donations from the fossil fuel industry.

“Secretary Clinton, you owe us an apology. We were telling the truth,” Sanders in response to accusations from Clinton’s campaign that he and his campaign had been “lying” and misconstruing Clinton’s relationship with the oil and gas industry.

“The truth is that Secretary Clinton has relied heavily on funds from lobbyists working for the oil, gas, and coal industry,” Sanders said in. . .

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