Friend, you're a member of a web community which has more accurate data at its fingertips than any other. That you would stand there being petrified about a development which has close to 0.0% chance of occurring, is only due to the fact that you're not availing yourself of that vast treasure trove of knowledge.
The federal government doesn't control national elections - the states do. Washington has no authority in the matter, and the POTUS cannot just arbitrarily cancel the elections. If he tried, he'd be arrested on treason charges, and the VP would immediately step in in his stead. That's the way our system of gov't works. And it would work that way, due to the ammo sales you mentioned.
If the states control the elections, then how is it that they are being pressured by the feds into accepting UN observers?
You quote theory. The actual practice is much different.
By the way, I’m not petrified. But I believe in being prepared for anything. I put nothing past this administration. This president has gotten away with so many things that are illegal, immoral and unconstitutional. The various federal departments, such as Justice, ate corrupted beyond repair. Congress doesn’t have the balls. And the courts are useless. So I urge you to be vigilant and be prepared