Ezra Klein: LIMBAUGH.

If you happened to be unaware that there's a guy named Rush Limbaugh who hosts a popular program on AM radio, then this New York Times's profile will be an incredibly illuminating read. But if you happen to be aware of that guy already, and are wondering about the implications of the most popular radio host in America being a global warming denialist and self-described "defender of corporate America," then the piece stands as an extraordinary act of editorial cowardice.