Hillary's responsibility for Benghazi (even if never found egregious in eight investigations) is the result of her authority to make life and death decisions. While Trump may have made a different decision if he had the same authority, he never did have such authority.  We can only suppose what he would have done. He's off the hook because he never had a chance to be on the hook. We might as well say, "Trump was no where to be found when it came time to take out bin Laden." Which would be an unfair comparison. 
I really don't get his statement:  "Of course those women survived to live and be happy. That can not be said for the men who died in Benghazi."