What geo? If you want a historical US perspective there is a book titled American Nations: A History of the Eleven Rival Regional Cultures by Colin Woodward. S

What geo? If you want a historical US perspective there is a book titled American Nations: A History of the Eleven Rival Regional Cultures by Colin Woodward. Spoiler alert - many areas of the US have political leanings shaped by the people that originally settled there (and by settled I mean mostly Europeans ousting the original people that were there).