Last week, Chris Christie launched this ad, calling Gov. Jon Corzine (D) "deceitful" for his campaign's attacks about whether Christie's health care plan would cover mammograms.

Today, as a poll shows that this and other attacks have been successful in driving Christie's negatives higher, the Corzine camp responds to Christie's response, and calls him "completely deceitful."

Christie's ad had cited a newspaper article saying that Corzine's attacks "skew the truth," but Corzine ad cites another report saying that it "happens to be true," and refers to the Republican's own Web site.