Take the case of the Bridge to Nowhere, which supposedly gives Ms. Palin credentials as a reformer. Well, when campaigning for governor, Ms. Palin didn’t say “no thanks”  she was all for the bridge, even though it had already become a national scandal, insisting that she would “not allow the spinmeisters to turn this project or any other into something that’s so negative.”

Oh, and when she finally did decide to cancel the project, she didn’t righteously reject a handout from Washington: she accepted the handout, but spent it on something else. You see, long before she decided to cancel the bridge, Congress had told Alaska that it could keep the federal money originally earmarked for that project and use it elsewhere.

So the whole story of Ms. Palin’s alleged heroic stand against wasteful spending is fiction.

Or take the story of Mr. Obama’s alleged advocacy of kindergarten sex-ed. In reality, he supported legislation calling for “age and developmentally appropriate education”; in the case of young children, that would have meant guidance to help them avoid sexual predators.

And then there’s the claim that Mr. Obama’s use of the ordinary metaphor “putting lipstick on a pig” was a sexist smear, and on and on.

Image Paul Krugman Credit... Fred R. Conrad/The New York Times

Why do the McCain people think they can get away with this stuff? Well, they’re probably counting on the common practice in the news media of being “balanced” at all costs. You know how it goes: If a politician says that black is white, the news report doesn’t say that he’s wrong, it reports that “some Democrats say” that he’s wrong. Or a grotesque lie from one side is paired with a trivial misstatement from the other, conveying the impression that both sides are equally dirty.