Obama's Negative Ads In Colorado

I've given up trying to explain the difference, to me, anyway, between a negative ad and a contrast ad, so from now on, I'll just use "negative ad" to refer to both personal attack ads and issue contrast ads.

As widely noticed, Barack Obama has been running tough contrast ads ... negative ads, fine... in at least a half dozen states. The campaign has taken to not informing the media of their ad buys, on purpose, so as to give themselves a few days or even hours worth of deniability and a competitive advantage.  A reader sends along this ad on the economy; it's airing in Ohio and Colorado with just a few words changed.

"How can John McCain fix the economy. When he doesn't think it's broken?"