First, there are no conspiracies. Nobody was in the grassy knoll. The CIA wasn't responsible for AIDs and the crack epidemic. Why do I know this? It's human nature. People can't keep secrets and people can't agree. It would be impossible for all the members of the mainstream news sources and top political leaders to pull off a plan to dethrown Bush without somebody leaking information.Perhaps not. The simpler explanation is that the contents of the phony documents were sufficiently consistent with the prejudices of everyone at CBS who vetted it that the story went out without much vetting.
None of which will prevent defensive lefties from arguing that they are in the minority, in the newsroom and in the country.