Mattis Resignation: 'You Have the Right to Have a Secretary of Defense Whose Views Are More Aligned'
Mattis had served as Defense Secretary since January 2017. His resignation came after Trump announced — via tweet, without military consultation — that he was withdrawing U.S. troops from Syria, effectively abandoning the Kurdish partners who had done the ground fighting against ISIS. Mattis's resignation letter was unusual in its directness: it stated that he believed Trump had not treated allies with 'respect and seriousness' and had not been 'clear-eyed' about the threats posed by adversaries including Russia and China. Trump, initially describing the departure as planned, later forced Mattis out before the end of his original tenure after the letter's contents became widely circulated.