Looks like Joe Biden is helping out with Obama's speeches. Plagiarism we can believe in!
MORE: Looks like we shouldn't blame Joe:
Asked about the borrowing, Obama spokeswoman Jen Psaki said Obama used Toles's lines unwittingly, after being alerted to them by a friend who didn't mention the source.
"This came to Senator Obama from a friend who didn't indicate where he had gotten it from, but the questions it raises certainly continue to ring true," Psaki said in an email. "He did not know it was from a cartoon and now that he does he will certainly credit the cartoonist."
In fact, the campaign says, Obama used the line again while campaiging today in Michigan, this time crediting the "cartoon in The Washington Post."