If Perry wants to do something , call up the National Guard. Station them along the border.
If Zer0 or Holder object, ignore them. If a judge orders the Guard to stand down, ignore him.
What’s Zer0 going to do? Arrest the Guard?
THAT is exactly why Perry needs to call up the Texas State Guard instead of the National Guard. The TSG is under his sole command and cannot be nationalized.