Deseatit.
One tweet from POTUS would unleash the biggest and most heavily armed army the world has ever seen.
That would give him time to call the Marines and tell them to get the hell out of the way before they got hurt.
It's already Unobtanium. Last time I looked two weeks ago NATO .556 was going for a buck fifty a round if you could even find it.
If you didn't already have your ammo squared away you are fucked.
Last I got was .65 a round.