Heck. It appears that when the Democrats become marginalized again, they may become the party for Middle-Class Westerners with little appeal anywhere else.
The numbers disagree. Among people making between $50,000-$100,000 nationally, Obama and McCain tied. In Colorado, the same group barely favored Obama giving him 51% of the vote as opposed to McCain's 47%. When you consider that Colorado gave Obama a victory margin 2 points above the national popular vote, the difference between Colorado middle-class voters and national middle-class voters is negligible. Personally, I think there will be a Democratic backlash in the Southwest.