Supposedly, it has something to do with armed military personnel on the streets that are not performing "military police duties". You know, pesky Constitution .
So they follow it when they want to, and ignore it when it fits their agenda. Got it.
“Make men large and strong and tyranny will bankrupt itself in making shackles for them.” – Rev. Henry Ward Beecher (1813-1887) US Abolitionist Preacher