An invigorated Jeb Bush defied his party’s lurch to the right over immigration on Monday with a passionate speech to the Hispanic Chamber of Commerce, in which he called for a path to legal citizenship for undocumented migrants. Fresh from a presidential debate that saw him criticized for speaking Spanish, lacking energy and having a Mexican wife, the former Florida governor took the jibes from Donald Trump and appeared to feed off them before an audience of business leaders in Houston. “Earned legal status is the dignified way, the practical way, the American way of solving the problem of 12...