To your first point, he would do it to enforce our immigration laws and defend our border from people seeking to cross the border without permission.
As far as "missing the point," that seems to be just another way of saying, "I don't like what you said." I commented directly on his point about posse comitatus, indicating why his "Long Live the King" comment is either wrong, or misplaced on Trump. I would think that even you can see that. But, again, perhaps I expect too much from you.
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