This is now somewhat newsworthy, as (real) Melania is talking about suing a bunch of media outlets over talk of her as an escort. Guess when her and Donald have sex, his tremendously thin skin rubs-off on her. So people can say that Hillary absolutely murdered various people, absolutely committed crimes, and is a sexless lesbian, and that's ok, because she's a public figure, just like Melania.
If I recall, a public figure can sue for libel if the libeler knew or should have known there was no basis for the publication and if his, her or its actions evince malicious intent.
Some of the stuff protected by the 1st amendment
Manchester billboard now labels local business leaders as 'drug dealers' | New Hampshire
Profanity-laced business signs cause controversy | Local News - WMUR Home