That sounds interesting, you should start a thread on that scenario.
Governors, we always think only in terms of the feds. If we did have a total collapse, the feds would be mostly busy protecting us from outside threats, and protecting and operating military bases and critical installations, moving and/or protecting troops and bases scattered around the world, and maintaining some naval operations foreign trouble spots like Korea and so on, and the governors and National Guard would be doing most of the internal.
The feds would be totally over stretched and facing logistic and transportation nightmares.
My thinking says the feral welfare class is going to come back to bite the liberal fascists. If you do the math, you start realizing the Feds are in a paradox and have few options. If it falls apart, plunging tax revenue means they have to choose between welfare and troops. It becomes automatic at that point - little or no welfare, large liberal cities like NY, Chicago, LA, Boston and Miami burn, troops shift there in disproportionate numbers, small states are on their own.
It will ultimately be up to those states to keep their own order. At some point I see governors banding together and telling DC to take a hike. I could even see an constitutional convention to break away and reform the country into a smaller version, minus the dead weight.