I think the larger problem is they don't know how to really proceed. What is the impetus for the Pentagon to say; "Ok Mr. President, you've crossed the line, you're out of here."
The military has the "foreign enemies" part down, they just don't have the "domestic" part figured out.
I was talking to the father of one of our Scouts and he is torn between his oath and the current situation because he has no clue what options the military has in order to defend the Constitution against a "domestic" enemy like 0bama.
They need to look no farther than the Honduran military action that ousted Zelaya who decided to change the Honduran constitution to do away with term limits for president.