Someone should explain to ABC: it ain't "dirty" if it's true.  GMA got the collective vapors this morning over the robo-calls the RNC and McCain campaign are making, informing voters of Barack Obama's close association with unrepentant terrorist Bill Ayers.  

In GMA's book, there's no real difference between these calls—which Cokie Roberts alluded to as "dirtier" tactics—and the calls made against McCain during the 2000 South Carolina Republican primary.

Except there is a difference.  A big, fundamental one: what's said in the current calls is true.  Obama did work closely with Ayers. What was said in the 2000 calls against McCain in South Carolina was false: he didn't father a black child out of wedlock. He and wife Cindy adopted a Bangladeshi child.

View video here.

Dispatch from the Department of Glass Houses . . .

The Good Morning America crew had a bunch of yucks today at the expense of the Sparks, NV streets department employee who spelled "scool" on the asphalt. But within minutes, two ABCers made math mistakes of their own, one of a political sort, the other climate-related.

RON CLAIBORNE: In Sparks, Nevada, someone in the streets department could use a spelling lesson. A sign painted on the street announces a nearby facility is a "s-c-o-o-l" [sound of Claiborne chuckle]. The city plans to fix the sign as soon as possible. That's a first look at the headlines, back to Bill and Kate. Everybody knows school is spelled with a "k."

Great guffaws ensue.

View video here.