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.
Seriously, when are you going to change your avatar to blue?
Benghazi is over and has been throughly investigated and the only reason Republicans care about this is because of political reason, which is callous and cynical.
It is time to move on and let the fallen rest in peace.