Just to be clear, he was not convicted in court for being a sex offender. He was found civilly liable for sexual assault. Morally and realistically, these are the same thing. But technically and legally they are not. He has never been criminally tried for this sex crimes to date (which is ridiculous). Rather he lost a civil suit by his victim for them. A conviction specifically refers to being found guilty of criminal charges. Again this distinction matter very little EXCEPT in legal matters, but defamation is a legal matter.
Statements of true fact will never lose you a defamation case. Misrepresenting details by mistake should also be defensible in a defamation suit for a public figure as that requires actual malice, not simple negligence, in your language. But it is always better to use the correct language when speaking on such matters to, ideally, avoid the suit in the first place, or at the very least ensure you are in the clear, legally.
That being said, while not a convicted rapist, as rape is criminal offense for which he hasnt been charged, Trump was judged in court to have committed acts of sexual assault that do meet the legal conditions to qualify as rape in a criminal court. So Trump is a rapist, even if not convicted of said crime. Yet.
