It’s a frozen February evening in West Virginia, and John Kasich has gotten sidetracked yet again. For two full days, Kasich, the Republican governor of Ohio, has been wooing local legislators and jousting with the press as he tours Columbia, S.C., and Charleston, W.Va., in support of his longtime hobbyhorse: a federal balanced-budget amendment. He has also been telling everyone who asks, including a growing gaggle of national reporters (CNN’s Gloria Borger, Bloomberg’s Dave Weigel) that he is thinking about running for president in 2016. “I’m taking no options off the table in terms of my future,” Kasich, 62, declared...