Women. See my last.
The Pew demographic surveys that they update every few years (1999, 2005, last year) have consistently shown that the biggest, most solid demographic group in the liberal-Democratic armory is educated women, esp. women with advanced degrees. They are sharp, resourceful, good at organizing (like Republican women), doctrinaire, hate men, and are married ideologically to the DimRat Party.
This is the rock of DimRat fortunes -- women and the black vote, and, they hope, eventually the Mexican vote, which will break reliably 70/30 DemonRat whenever the 'Rats can get them into the polls (cf. Loretta Sanchez and her sister). *
Here is the significance of feminism:
Make a pie chart of the U.S. population. Minorities are 25%. Divide the rest in two, right down the middle. This is what Betty Friedan set out to deliver to the Communists (she was a Communist -- check her bio on Wiki) when she started laying out the arguments and dissatisfactions (agitation) that we now call "feminism".
Organize women around your b.s. propaganda issues, and you've put the whole society in play.
* (I said Mexican, because South American and Central American immigrants, when they get their papers and begin voting, tend to split up the middle. But Mexicans are "culturally conservative"; ie. they are tendentiously Socialist, either PRI or PRD; which is a leftover dividend for the CommieRats from the days of the 1919 Mexican Revolution.) That's why Lyndon Johnson and Ted Kennedy wanted Mexican mass-immigration (not "Hispanic") when they wrote the disastrous 1965 immigration law.
My anecdotal evidence shows you are correct. The only Obama 2012 bumper stickers I’ve seen were on the cars of disheveled middle-aged white women who I would guess are teachers or social workers....
The only thing missing in your new movie about America is who is going to play OUR General Pinochet. God, I miss him!