The blue states indicate those where President Obama enjoys an approval rating of 50% or more. Together they would equal 445 electoral votes in a presidential election, however I highly doubt he'd win them all. Even if his first term is superbly successful, I can't see Mr. Obama winning Kentucky, Tennessee, Arkansas, or Louisiana.
Then again, I didn't think he'd win Florida, Indiana, or North Carolina last November. So what the hell do I know?