Bill Moyers may have his politics, but his deferential demeanor and almost avuncular television style made him the Mr. Rogers of American politics. So when he leaves his neighborhood to go to a "Take Back America" rally and denounces George W. Bush's "government of, by and for the ruling corporate class," leading a "right-wing wrecking crew" engaged in "a deliberate, intentional destruction of the United States way of governing," you know that something is going on. That something is the unhinging of the Democratic Party. Democrats are seized with a loathing for President Bush — a contempt and disdain giving...