In this American Prospect article, Michael Tomasky explains what the controversy over John Kerry's service in Viet Nam "actually proves is that a bunch of liars who have in the past contradicted their own current statements can, if their lies are outrageous enough and if they have enough money, control the media agenda and get even the most respected media outlets in the country to focus on picayune "truths" while missing the larger story."
According to Tomasky, the "Swift Boat Veterans" have taken control of the media agenda because, "our media can sort through the facts in front of their nose and determine, at least some of the time, who's lying and who's not. But they are completely incapable of taking a step back and describing the larger reality. Doing that would require making judgments that are supposedly subjective rather than objective; but the larger reality here is clearer than clear. Just imagine if the situation were reversed: The same people now questioning Kerry's "character" would have worked to establish Bush as a war hero long ago. They would have labeled Kerry a coward. If by chance a liberal-backed group came forward to question Bush's wartime actions, they would have been called traitors and worse. And the mainstream media would be following the agenda they set every step of the way."