Regardless of who John McCain has at his side in Ohio in a few minutes, there is one thing for sure: McCain has masterfully grabbed command of this news cycle. Everyone is speculating on who his choice for VP will be. The biggest ruckus seems to be around Alaska Governor Sarah Palin, not exactly a household name in the lower 48. But what little is being said about her right now seems to be pretty positive.
Such a choice would give the Obama campaign fits.
And again, no matter who steps on stage with McCain, this news cycle belongs to him. He's knocked Obama out of discussion for a while. Look at the dominance on Memeorandum.