I would imagine most of them would be right wing. At the very least, center right. But it's an interesting thought experiment.

I would imagine that Canada, Mexico and maybe Cuba (specifically around Florida) would attempt to exert influence over the borders. The Southern border would be very interesting as the cartels would probably try and take over as much as possible. They'd likely do it through proxies because that's less resource intensive. Canada would probably do the same for most if not all the northern states including new York and California. In both cases, the string holders would probably encourage fighting amongst the fiefdoms until they were able to consolidate power in a friendly ruler. In Florida, I think it would go in a similar way, except with more boots on the ground. They'd likely do that to grab military assets, which would be important on the other fronts as well, but more so for Cuba given their economic situation. So the spots left over would probably be the spots that were of little interest economically and resource wise. I have no doubt that there would be a fight with the remaining American military, but fights are won by those with the best organization and supply chain. Balkanization would mean that the American military wouldn't have any supply chain, so they'd be fighting furiously to attempt to secure whatever their leadership thought was most important, so within a few months, for the most part they'd be reduced to small arms and light vehicles. Which would be why the cartels and Cuba would be able to gain control of an are if they attempted that. Russia/China might even try something for Hawaii and or Alaska. I'd imagine that China would do their usual soft power thing to secure a friend in the Pacific, while Russia would compete with Canada, and likely lose for a similar spot in Alaska. Greenland would be interesting because without the supply chain, those army bases and personnel would be immediately dependent on the Dutch for everything including food. The Dutch would end up getting some serious military upgrades. The rest of the world would breathe. A sigh of relief. Left wing movements would flourish while neoliberal government's would scramble to solidify their populace. Even the right wing in central and south america would see their quality of life instantly become better, and they'd wonder why.

Either way. A fun little thought experiment