You can see the electoral college flipping as we speak

If you look at the polls of likely voters (do not be fooled by the registered voter polls which are nothing more than flipping open the phone book with no attempt to filter for who may actually vote in the fall and are always and appreciably biased toward Obama), every day the numbers are more and more favorable to Mitt.  The latest states to flip:

Michigan--now 46-45 Romney

and

Ohio--now 46-44 Romney

Together they total 34 electoral votes.  Obama carried them both in 2008.  And if he cannot carry them again, he will not be President again.