States where the parties' strongest regions have flipped in the last 50 years

[soniquemd21921]

Ohio: Before the New Deal, the most Republican part of the state was always the northeastern "Western Reserve", while the most Democratic area was most of the German-settled western counties (i.e. John Boehner's district). Now it's the reverse.

Illinois: The northern counties were among the most rock-ribbed Republican counties anywhere in the nation, while the southern counties usually voted Democratic. However, in the last few presidential elections the southern counties have been providing the largest GOP pluralities.

Missouri: The southern-settled "Little Dixie" north of St. Louis was always the most Democratic area of the state. Now it votes Republican (at least in the presidential election).

[soniquemd21921]

How about:

California: Coastal and Southern California used to be the most Republican, while the mountain counties used to be the most Democratic. Now the mountain counties are the most Republican, while the coastal counties are the epitome of the "latte liberal" stereotype.

Oregon: Western Oregon was the most Republican area of the state, with Benton County the most Republican. Now the interior is the most Republican, while Benton County is one of the most liberal.