Oh, he's just the foremost example. If you don't know, read the WSJ editorials on the Milken case. Guiliani made his name there with the most brazen, unfounded, accusations imaginable. If government employees weren't protected from slander laws, he would have been sued and would have lost hugely. The (IIRC) 104 counts piled on just forced Milken to plead guilty to, I believe, 4 fairly minor counts just to save himself and some of what he'd worked for.
My accusations aren't unfounded, except to the ignorant. I just didn't realize that anyone on this forum wouldn't know about Guiliani.