John McCain's latest TV spot fits the very definition of a contrast ad.
An announcer says quick phrases as the image on the screen goes back and forth between Democratic rival Barack Obama and McCain.
"For higher taxes," the female announcer says with a photo of Obama.
"For workin' Joes," the announcer says with a photo of McCain.
And so on through: "Spread your income, keep what's yours, a trillion in new spending, freeze spending, eliminate waste, pain for small business, economic growth, risky, proven."
Obama, of course, would dispute all those characterizations.
About Political Intelligence
Glen Johnson is Politics Editor at boston.com and lead blogger for "Political Intelligence." He moved to Massachusetts in the fourth grade, and has covered local, state, and national politics for over 25 years. E-mail him at firstname.lastname@example.org. Follow him on Twitter @globeglen.