Washington • The extraordinary resignation letter that Defense Secretary Jim Mattis handed to a surprised President Donald Trump was not just a product of two years of accumulating frustration with an impulsive boss, but an outline of the strategic hazards facing the next Pentagon chief.
Mattis, who was quietly back at work Friday while stunned Pentagon staff soldiered on around him, implicitly warned in his letter to the president of the threat to the U.S. from allowing alliances to fray and of the risk that disrespecting allies will undermine U.S. credibility.
It was an outline of the challenges facing the nation and whoever takes over as defense secretary when Mattis leaves Feb.