https://www.reuters.com/article/us-usa-trump-mattis/trump-annoyed-by-resignation-letter-pushes-out-mattis-early-idUSKCN1OM0HO
WASHINGTON (Reuters) - U.S. President Donald Trump on Sunday said he was replacing Defense Secretary Jim Mattis two months earlier than had been expected, a move officials said was driven by Trump’s anger at Mattis’ resignation letter and its rebuke of his foreign policy.