When she was hammering him on releasing his tax returns, he should have said "when you release your medical records, I will". He should have made the emails a priority of her not being trustworthy, the lies etc. The Benghasi situation was barely spoken about. There were several things he should have hammered her on in my opinion.
"A booty call is like a 1/2 eaten sandwich in the refrigerator. You don't know who was eating it last, but you do know that it's 2 a.m, and you are starving"