Yeah, Mattis isnít a sycophant. He obviously disagrees strongly with much of Trumpís agenda. Iíve got to think that the Syria withdrawal and talk of building The Wall with the military budget were the final straws, along with the disagreement about the new Joint Chief.
Nikki Haley and General Mattis were two of the only competent members of the administration as related to foreign policy. I donít hate Mike Pompeo, but right now itís a weird combo of Trump, Kushner and Miller driving the train.