John McCain challenged by double negatives -- He agrees & disagrees with whom exactly?

Sure he made an 'honest' mistake and he is tired. I mean we'd all be tired & he is 72, but doesn't that worry you...his slip of the tongue could be just as bad as Dubya --
That could get our country into BIG, BIG TROUBLE!

TRANSCRIPT:
JOHN MCCAIN: I think you may have noticed that Sen. Obama's supporters have been saying some pretty nasty things about Western Pennsylvania lately. [crowd boos] And you know, I couldn't agree with them more. I couldn't disagree with you. I couldn't agree with you more than the fact that western Pennsylvania is the most patriotic, most God-loving, most patriotic part of America. This is a great party of the country. My friends, I could not agre-- I could not disagree with those critics more; this is a great part of America. This is the heartland of America. This is where people love their country and they serve it.