A University of California Berkeley energy professor resigned from his science envoy position with the Trump administration Wednesday, citing the president’s “hate-filled rally” in Phoenix Tuesday, his recent remarks on Charlottesville and his decision to withdraw from the Paris climate accord.Professor Daniel M. Kammen used the first letter in each of his seven-paragraph resignation he tendered to Trump to spell out the word I-M-P-E-A-C-H.Kammen, appointed as one of five U.S. Science Envoys by the State Department, made his resignation letter public on Wednesday. He sent out a tweet reading, “Mr. President, I am resigning as Science Envoy. Your response to Charlottesville enables racism, sexism, & harms our country and planet.”He said the president’s remarks in Arizona Tuesday night cemented his decision to resign. At a rally in Phoenix, the president repeated his pledge to build a wall on the Mexico border and said he may terminate the North American Free Trade Agreement. Trump also hinted he would pardon Joe Arpaio, the former Arizona sheriff found guilty of defying a 2011 court order to stop traffic patrols that targeted immigrants.“What I would be working for is inconsistent with the values the president is putting forward,” Kammen told The Chronicle Wednesday. “I would love to jump right back into this role if there was a U.S administration supporting a positive presence both at home and overseas.”Trump was roundly criticized for his response to a deadly Charlottesville protest led by white nationalists and neo-Nazis railing against the removal of a statue of Confederate General Robert E. Lee.Trump had said “we condemn in the strongest possible terms this egregious display of hatred, bigotry, and violence” but came under fire for adding there was blame on “many sides” and saying there were “fine people” among the white supremacists and neo-Nazis.In his open letter to Trump, Kammen wrote his decision to resign “is in response to your attacks on core values of the United States.”“Particularly troubling to me is how your response to Charlottesville is consistent with a broader pattern of behavior that enables sexism and racism, and disregards the welfare of all Americans, the global community, and the planet,” Kammen wrote. “Examples of this destructive pattern have consequences on my duties as Science Envoy. Your decision to abdicate the leadership opportunities and the job creation benefits of the Paris Climate Accord, and to undermine energy and environmental research are not acceptable to me.”Kammen had focused on energy and climate in Africa and the Middle East as a Science Envoy, a largely honorific position facilitated with the resources and platform of the U.S. State Department. Stationed out of Berkeley, he worked closely with U.S. ambassadors in Morocco, Kenya and Jordan to enable scientific exchange on environmental research.He was appointed as a Science Envoy in 2016 under the Obama administration. He said he’s worked for 25 years in Africa, and will continue to do so as a private citizen.“It just was not possible to work with this administration,” he said. “This is not a political climate that is raising up the U.S. partnerships overseas, and so it’s time to step down.”