HERE'S the difference between this year's battle over public broadcasting and the one that blew up in Newt Gingrich's face a decade ago: this one isn't really about the survival of public broadcasting. So don't be distracted by any premature obituaries for Big Bird. Far from being an endangered species, he's the ornithological equivalent of a red herring. Let's not forget that Laura Bush has made a fetish of glomming onto popular "Sesame Street" characters in photo-ops. Polls consistently attest to the popular support for public broadcasting, while Congress is in a race to the bottom with Michael Jackson. Big...