RE post 51, you are generally correct but I think you are far too optimistic. Two weeks for anarchy? No communications, no power, no ATMs, no EBTs means anarchy in a couple of hours, not a couple of weeks.
It would make Katrina look like a Sunday social in Amish country.
For highly urbanized areas your are probably closer to right than I am. High-rise dwellers without power, water, & heat will be essentially homeless. That will create chaos.
But, rural areas will fair better, with fewer people seeking scarce resources. Everybody knows everybody in the country, so cooperation is more likely than anarchy. Rural America wont panic nearly as quick as city folk, if at all.