Why hasnt Moore filed a libel or slander suit against WaPo?

Why hasn't Gloria turned over the yearbook?

The truth is an absolute defense and Moore knows it.

not even doing it

Because Moore is considered a "public figure" and his lawyers know the burden of proof is so high it would be a waste of time.

" In the context of defamation actions (libel and slander) as well as invasion of privacy, a public figure cannot base a lawsuit on incorrect harmful statements unless there is proof that the writer or publisher acted with actual malice.

"The plaintiff must produce clear and convincing evidence that the defendant actually knew the information was false or entertained serious doubts as to the truth of his publication. In making this determination, a court will look for evidence of the defendant's state of mind at the time of publication and will likely examine the steps he took in researching, editing, and fact checking his work. It is generally not sufficient, however, for a plaintiff to merely show that the defendant didn't like her, failed to contact her for comment, knew she had denied the information, relied on a single biased source, or failed to correct the statement after publication.
Not surprisingly, this is a very difficult standard for a plaintiff to establish. Indeed, in only a handful of cases over the last decades have plaintiffs been successful in establishing the requisite actual malice to prove defamation."

Because it’s almost impossible to win a libel lawsuit against a journalist?