Wow, great ad! You definitely get the feeling that Grimes has some momentum here (especially with McConnell's huge donation to himself yesterday). But is it just illusory Romney-in-PA-esque momentum? I guess we'll see.
There's always that one state that both of the parties throw good money after bad into and it turns into being a waste. It looks like the Minority Leader has a persistent lead in Kentucky. Maybe Grimes can close the gap, but it appears unlikely at this point.
With that said, I am sure there are a number of Tea Party Conservatives that would love to see McConnell go down in flames, even if it comes with the price of the Republicans not taking the Senate -- as absurd as that sounds. He's the ultimate RINO to bag in their book.