Glenn Beck has produced a documentary on the "cancer" of "progressivism." It would behoove him to take a look at libertarianism. The latter is a disease that Beck himself featured on April 15, when analysts from the libertarian Cato Institute were on his show to argue for drastic cuts to the U.S. defense budget, acceptance of a nuclear-armed Iran, and an American military withdrawal from the rest of the world. America's allies, especially Israel, would just have to fend for themselves.