Re: What's the constitution got to do with anything?
The First Amendment literally says that "Congress shall make no law . . . abridging the freedom of speech, or of the press". Accordingly, Congressional laws against slander and libel can only be enforced insofar as they do not abridge freedom speech or of the press. Accordingly, every single claim made under the slander and libel laws has to be evaluated as to whether enforcement of the claim would abridge either of those freedoms. If it would, the law against slander/libel is unconstitutional, and therefore the law is null, and thus the claim of slander or libel is null.