A U.S. Ambassador killed in the way that Ambassador Stevens was is a matter of public record. Trump maybe should say he'll stop mentioning Stevens by name, but to imply that everyone needs to stop talking about the incident because it's uncomfortable for the Secretary of State under which it happened? Sorry, mom, but your boy accepted a public position in the foreign service of the United States, and such positions are (and need to be) accompanied by a fair amount of public scrutiny. Asking about the circumstances surrounding the death of the Ambassador and three other men? That is fair game, no matter how you cut it.
It's fair game until all 11 or 12 of the committees investigating Hillary about Benghazi have come up short of finding her guilty of doing anything wrong. It's time to LET IT GO. The family of the man who was killed has let it go.
Anything after this point is pure political witch hunt. Something the GOP does so well and so consistently with Hillary.