That's been the norm since 2000.
I don;t think djt will do this. Number 1) it really is a Constitutional issue.
Number2) it will get hung up in the courts.
With the above in mind, he is alluding to this possibility to get Congress to act after the the new Congress convenes in 2019.
You can't be that big of an evil asshole and not get whacked by somebody.
File under I DON'T CARE,
My money is on the guess that he already talked and (((they))) knew.
This was just a prison transfer.