Is the new populism about the message or the medium?

Before Chris Christie deflated him in a debate over the weekend, he seemed to be surging, the establishment’s last best hope, not too weak, not too mean, not too wild, not too bland, the G.O.P.’s Goldilocks.

.. Rubio has an appealing Mickey Mousiness. Also, he can be funny, especially if you haven’t seen his shtick more than a few times. (A stump speech at a campaign stop is a lot like standup comedy.