No cars, trucks, buses, trains, or subways, or other mechanized transport requiring electricity or fuel provided by electricity. With no distribution, fuel stores will be quickly exhausted and little or no road traffic will exist, no trains, etc. after a very short period. Even if the means to grow sufficient food to feed ourselves as a country existed (it doesn't without mechanization) without distribution most would rot in the fields and there would be mass starvation and all the chaos appertaining thereunto.
If you disagree with any of my posts, take a look at the original posters hypothetical and then in that light, not some personally reworked variation, make your case. I'm willing to be persuaded by a logical argument based on realistic and believable premises (unlike the hypothetical itself.) Simply asserting the military will be well behaved, great artists will arise out of the minor difficulties, and the indomitable spirit of the American people (hum "The Battle Hymn of the Republic" quietly and respectfully in the background during this part) will triumph over all adversity and return to a simpler time when we could all risk polio, unsafe patent medications, embalmed beef, dawn to dusk labor etc. you know, the good old days!
As detective Columbo used to say, "I have just one more question."
"But, if such a button was pushed - I think you will find more American's, indeed humanity more resilient than you give them credit for."
Well, du-uh, What makes them starvation proof for the first few days or weeks after the supply line/conveyor belt bringing Post Toasties to the supermarket stops running? Logistics is not subject to wishful thinking. It, like gravity, is not subject to negotiation or wishful thinking. If every horse in America were a Clydesdale you still couldn't pull enough carts to keep the vast majority of the population from starving and or freezing the first winter.
Left to their own devices a decent percentage of the rural population might survive after a fashion through subsistence farming B U T they will not be left to their own devices, instead they will be overrun and pillaged by roving bands of armed vandals from the cities and suburbs in such overpowering numbers that armed defense is extremely problematical at best.
Pat