Winter ain’t too bad in the southern and south western states.
The majority of the population lives in the North East.
Winter would only be the most advantageous time to start a overthrow of America.
Cutting off or controlling the food supply is on the top of the list. Also, shutting down or controlling the Highways and Airports.. including oil/gas flow. Also, shutting down or controlling communication (airways and the internets).
They wouldn’t even have to have complete controll to controll a half asleep mass.
The proud ignorant might even join the revolution.
Cities could go nuts killing and looting at will. Think LA riots times 100? 1,000? 10,000?