Blackwell throws some stones.

You've no doubt seen the latest TV ad from the Jim Petro campaign - the one where a woman actor who can barely control her anger rattles off a list of business investments made by Ken Blackwell in radio stations that play vulgar music and companies that make birth-control pills and slot machines. At the end, she concludes there is only one word to describe a candidate who says he is anti-abortion and pro-family and makes such investments - "Hypocrite.''

The "hypocrite'' label is meant to sting Blackwell with a large block of Republican primary voters who have carried him thus far - the Christian conservatives, both Catholic and evangelical whom many believe have called the shots in the GOP in recent years.

The Blackwell campaign could not let this "hypocrite'' label stand, so it knocked off a radio commercial that is running on Christian radio stations around Ohio.

The ad, read by Blackwell himself, is clearly for those Republican primary voters who spend their Sunday mornings in a church pew:

"People in glass houses should not throw stones,'' Blackwell says. "And that piece of wisdom comes from our Lord, who suggested anyone without sin could cast the first stone.

"Out of desperation, Jim Petro is throwing stones,'' Blackwell continues, "viciously accusing my wife Rosa and me of hypocrisy. (Note: nowhere in the Petro ad is Rosa Blackwell mentioned.)

"When Rosa and I were informed we owned stock in questionable companies, we made the decision to sell it. End of story.''

Blackwell then goes on to lob a few stones of his own - saying that while he worked for passage of the Ohio Marriage Amendment in 2004, Petro opposed it and, as Ohio attorney general, "refuses to enforce it.'' He also brings up once again Petro's former pro-choice position on abortion, which Blackwell says Petro changed when he started running for the GOP gubernatorial nomination.