Professor Daniel Kammen, up until today the State Department’s ‘Science Envoy’, has served in various Federal agency roles for over 20 years, since 1996. Today the UC Berkeley Professor of Energy, and Director of the Renewable and Appropriate Energy Lab (RAEL), sent President Trump a letter of resignation in which the first letter of each paragraph spells out “IMPEACH”. Here is the full text of that letter, which Professor Kammen posted on Twitter.