"Crowley is the first woman in 20 years to moderate a presidential
debate. Last week, ABC News' Martha Raddatz was praised by critics for
her moderation of the vice presidential debate. PBS' Jim Lehrer, who
moderated the first presidential debate of 2012, was widely criticized for losing control and allowing both candidates—Romney in particular—to "steamroll" him."
So when you let a Democrat act like an asshole, you are a great moderator. But when you let a Republican ask to defend his position, you suck as a moderator.