Bob Iger, the chairman and CEO of The Walt Disney Company, said Thursday that he is resigning from President Trump's advisory council on policy over Trump's withdrawal from the Paris climate deal.

Iger tweeted that he was resigning as "a matter of principle" in response to Trump's formal announcement that he is pulling the U.S. from the Paris agreement.

As a matter of principle, I've resigned from the President's Council over the #ParisAgreement withdrawal. — Robert Iger (@RobertIger) June 1, 2017

Iger joins Tesla CEO Elon Musk in resigning from the councils over Trump's decision. Musk said Thursday that he would drop out of the two councils he was on, tweeting: "Climate change is real. Leaving Paris is not good for America or the world."

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Other CEOs said they would stay on the advisory councils, including Ginni Rometty of IBM, Brian Krzanich of Intel and Michael Dell of Dell.