http://www.washingtonmonthly.com/blogphotos/Blog_Cola_Large.gif I came across this demographic today. People in the Mid-West and the North West of the United States drink 'pop'. People who live in the South drink 'coke' and people on the West and East coasts drink 'soda'. Never having spent much time in the U.S. myself I wondered what this might mean. Of course, we have Tocqueville's division of…