Should Obama Trade Chicago for Phoenix?

Invoking Studs Terkel, Oprah Winfrey, and Barry Goldwater, Tristam Hunt of the Times Online suggests that Obama needs to trade in Chicago's "progressive European tradition" for the "Wild West, libertarian ethos" of Phoenix. What he's really suggesting is that Obama needs to nail down the sprawling periphery to win it:

For all his love of metropolitan, liberal Chicago, it is grumpy old John McCain's Phoenix that represents the psephological future. And sooner or later, Mr. Obama will have to join those tens of thousands of his Illinois compatriots swapping the icy winds of downtown Chicago for the sprawling embrace of metropolitan Phoenix

For McCain, Patrick Ottenhoff lists his top 5 places McCain should go, leading with the Ohio River Valley tour, to focus on the economically depressed areas where Obama fared poorly vs. Clinton.