Welcome to Opinion’s commentary for the third Republican presidential debate, held in Miami on Wednesday night. In this special feature, Times Opinion writers and contributors rate the candidates on a scale of 0 to 10: 0 means the candidate probably didn’t belong on the stage and should have dropped out before the debate even started; 10 means the candidate can head to Iowa and New Hampshire with the wind at his or her back. Here’s what our columnists and contributors thought about the debate. Jamelle Bouie On abortion, at least, Nikki Haley knows how to sound like a moderate. And...