My colleague Ella Koeze tells me that Chris Christie has been attacked only three times so far tonight — compared with 22 times for Rubio, 16 for Trump and nine for Cruz. Reminds me a bit of a game of Risk where you have the third- or fourth-strongest army and no one attacks you because you’re not in first or second place. If you’re nevertheless strong enough to mount a threat to win the game, that can become an advantageous position. This is vaguely the path that John Kerry followed to becoming the Democratic nominee in 2004 — he didn’t seem quite threatening enough for anyone to attack him until it was too late.