I t is a rare thing to see Josh Shapiro sweat. For all the grief the Pennsylvania governor gets for imitating Barack Obama—the staggered cadence, the side-of-the-mouth delivery for effect—their essential shared trait is self-possession. If Pennsylvania’s governor has a superpower, it is an unflappability that allows him to stay cool and composed and to communicate precisely what he wants to communicate. Most of the time. I sat down to talk with Shapiro earlier this fall, shortly after he held a