Mr. Obama has also been accused of distortions, but this week Mr. McCain has found himself under particularly heavy fire for a pair of headline-grabbing attacks. First the McCain campaign twisted Mr. Obama’s words to suggest that he had compared Gov.
Sarah Palin, the Republican vice-presidential nominee, to a pig after Mr. Obama said, in questioning Mr. McCain’s claim to be the change agent in the race, “You can put lipstick on a pig; it’s still a pig.” (Mr. McCain once used the same expression to describe Senator Hillary Rodham Clinton’s health plan.
Then he falsely claimed that Mr. Obama supported “comprehensive sex education” for kindergartners (he supported teaching them to be alert for inappropriate advances from adults).
Those attacks followed weeks in which Mr. McCain repeatedly, and incorrectly, asserted that Mr. Obama would raise taxes on the middle class, even though analysts say he would cut taxes on the middle class more than Mr. McCain would, and misrepresented Mr. Obama’s positions on energy and health care.
A McCain advertisement called “Fact Check” was itself found to be “less than honest” by FactCheck.org, a nonpartisan group. The group complained that the McCain campaign had cited its work debunking various Internet rumors about Ms. Palin and implied in the advertisement that the rumors had originated with Mr. Obama.