That's not the issue.
The question is, why would the Republicans resort to such a transparently bogus controversy. Simply reading a transcript, or hearing the speech demonstrates conclusively and indisputably that Obama was addressing the McCain ticket's economics; not the VP.
So it's not about who is on the ropes, or not. The issue is why the Republicans are acting as if they're on the ropes, to resort to such a flimsy, transparent, patently bogus ruse.