I just don't see it. If Obama couldn't win the states in the dismal GOP year 2008, I can't see him taking them in in 2012, unless the GOP nominates a total loser and he wins them almost by default.
I agree, except in the case of Arizona, which IMO would have voted for Obama had it not been McCain's home state though the immigration lawsuit may have changed that in 2012.
That being said, Obama's 2008 campaign was so wealthy that it had basecamps in all 50 states and ran national advertisements, including a 30 minute primetime infomercial. He's targeting all of the above.