Since we're speaking of hyptheticals...
Obama would have to give the order to fire on and kill hundreds of thousands of US citizens at that point. If he did...how do I put this nicely?......since we are still speaking hypothetically...his ability to expel CO2 would be compromised. At that point I doubt the Union would survive.
Let's not forget that the Obamination would need the support of a large number of the military, police and whatever "other" federal protection agencies in order to carry out such a plan.
While I think the Obamination is evil at hart I don't however think that enough Americans would be willing to turn their guns on each other for this pres__ent.
At least I hope I am right.