(CNN/RNN) - "Impeach” was the not-so-subtle message in a resignation letter addressed to President Donald Trump on Wednesday. State Department science envoy and professor Daniel Kammen is the latest person to quit.
Kammen has been a frequent critic of the president's policies and views in his tweets before the events in Charlottesville, VA.
He was appointed to the State Department position in February of 2016 and has served in many federal roles for about 20 years. Kammen posted the letter on his Twitter account, spelling out "impeach" with the first letter of each paragraph.
Kammen wrote that Trump's response to the violence in Charlottesville, VA, enabled racism and sexism.
At first Trump said, "many sides" were to blame for the violence at the event as he condemned hatred, bigotry and violence. He later condemned Neo-Nazis and the KKK.
Kammen went on to write, "Acts and words matter. To continue in my role under your administration would be inconsistent with the principles of the United States oath of allegiance to which I adhere. Character is vital in leadership."
At Kammen's Twitter site he describes himself as a professor of energy at the University of California at Berkeley, and director of the Renewable and Appropriate Energy Lab.
Mr. President, I am resigning as Science Envoy. Your response to Charlottesville enables racism, sexism, & harms our country and planet. pic.twitter.com/eWzDc5Yw6t
— Daniel M Kammen (@dan_kammen) August 23, 2017
He was appointed the first Environment and Climate Partnership for the Americas (ECPA) Fellow by Secretary of State Hilary R. Clinton in April 2010, the University of California at Berkeley web site says.
Copyright 2017 CNN/RNN. All rights reserved.