Where did you get that idea?
I've always considered it hilarious, in sad sort of way, that one of the few things our Federal government is Constitutionally authorized to do is one of the (very) few things it refuses to do.
I assumed that he probably thinks that habeas corpus somehow prevents the military from serving along the border. Nevermind that militaries, in normal societies, usually exist for the sole purpose of directly protecting the borders of their respective nations.
It wasn't relevant to my argument so I let it slide.