I was out to dinner last night--the duck at Il Fornaio was great!--so I missed the Republican debate. That was too bad, because apparently the highlight of the night was Chris Christie's brutal beatdown of Marco Rubio over precisely the point I made a few days ago. Here's my version: To me he seems like a robot: he's memorized a whole bunch of virtual index cards, and whenever you ask a question he performs a database search and recites whatever comes up. The index cards aren't bad, mind you, and I suppose they allow him to emulate a dumb person's...