I know that isn't exactly comparing apples to apples, but does anyone happen to know how many counties in the U.S. voted for Herbert Hoover in 1932 and Barack Obama in 2008. I know the county I live in went to Hoover in 1932 and to Obama this time so I was just wondering how many other traditionally, die-hard republican counties are now democratic.
I think the electorate has shifted in such a dramatic way between these two elections that you're not even comparing apples to oranges. It's more like you're comparing apples to orangutans.
Back in '32 Republicans still dominated the Northeast and Democrats could count on double digit margins in the Deep South. FDR put up >90% in four southern states and he was >80% in three more.