I think he shouldn't have let Gym dodge his question about her conflict of interest in voting against the pharma rep bill. If being perceived as aggressive is the only way of preventing a politician from dodging a perfectly reasonable, important question, then I think a responsible moderator needs to be aggressive.

Maybe Nutter could have held Gym accountable by some means other than apparent aggression. Something about catching flies with honey instead of vinegar. But, as a voter, it's much more important to me that they do it than how they do it.