(This is kinda inspired)
So in my AU everyone's houses (or rooms if we're talking about states) is full of their culture and the weather around the house is the same as theirs. So if it was snowing a lot in Canada then snow will happen near his house.
Also our feelings can affect countries.
If a lot of Americans get depressed then Ame will probably get kinda depressed.
Also if an event happens in the country or state then it may somehow affect the country or state. And if an event happens to the country/state then it will happen their place/country/state.
So if California gets lit on fire then the state will also light on fire.
And lastly they can go other countries and their country.
(Disclaimer)
I also know that American bought Alaska from Russia, I'm just to lazy to think of a way to fit it in my AU.