What would you do if you were a high-profile governor caught in the midst of a pseudo-scandal, with the national news media hanging on your every word? Here’s an idea: rather than focus exclusively on hurling accusations and counter-accusations, talk about something that actually matters. That is what New Jersey Gov. Chris Christie did this past week. After weeks fending off accusations that he had systematically abused his power to punish his political enemies, Christie spent a good chunk of his second inaugural address on criminal justice reform. Cynical observers might conclude that the governor was shrewdly changing the subject, and they’d be right. But it happens that he is changing the subject to the most vexing policy challenge facing the United States, and arguably the most sorely neglected.