You don't say: American political comedy skews left

Though the nation has been closely divided along partisan lines for years, the funniest and most politically important acts are overwhelmingly at the expense of conservatives and often carry a clear partisan message.

“You do have conservative humor, but in the mainstream, it has become so dominated by liberal dislike of conservatives,” said Richard Vatz, a professor of rhetoric and communication at Towson University in Maryland who writes for a conservative blog. Millions have downloaded Sarah Silverman’s Internet video urging Jewish children to fly to Florida and persuade their grandparents to vote for Obama, whom she calls “our last hope of ending our reputation as the [expletive] of the universe.”