People here don't understand that the only way Romney can collapse beyond slightly worse than McCain 2008 levels (McCain 2008, not sure about Indiana, maybe add in Montana, Arizona, Missouri) is in the event of a 9/11-style terrorist attack or the outbreak of WW3, somehow, in which case Romney will do far worse; winning only a few states; ID, UT, OK, and the Deep South.
Yes--we can't take McCain 2008 as a baseline for further collapse because, well,
McCain collapsed in 2008. A Romney collapse is Obama doing about as well as he did in 2008, minus Indiana where he made no effort this year, and with other variables coming from McCain and Romney being different people and Palin and Ryan, etc.