The revolving door of the current administration has another Cabinet position being vacated.
Maybe this one is different... General Mattis is something of a Rock Star when it comes to his credentials as a military commander and seemingly simple, straightforward no-BS approach to things. Aside from warfighter activities, the fact that the DoD conducted it's first EVER financial audit is a very significant accomplishment (yeah..so it failed.. shocker)
The Administrations left-turn on Syria seems to have been the final straw.
Initial story
here
There was a comment that popped up somewhere concerning this decision on Syria being an "abandonment of the Kurds". Hate to tell the guy who made that comment that we screwed the Kurds a long time ago....