He signed an EO so he could spin a bullshit story that he was solving a "long standing problem" under the lie that this was a pre-existing situation.
Miller is a fuckwit, just like Bannon was. This strategem utterly blew up in their faces, as anyone who isn't blinded by racist hatred and a skewed perspective of the world through the prism of an alt right internet circlejerk could've seen immediately. Even Nielsen knew better lol.