POCAHONTAS, Iowa — Ted Cruz on Thursday reached back to the 2014 election cycle to argue abortion is a losing issue for Democrats, holding up his state's last gubernatorial race as prime evidence.Asked during a question-and-answer session with voters about how Republicans could run effectively on social issues in states beyond Iowa, home to the first nominating contest, Cruz insisted the GOP has nothing to be ashamed of. On abortion, for example, he argued Democrats, including presidential frontrunner Hillary Clinton, are out of sync with the overwhelmingly majority of voters. “You know who doesn’t think abortion is a winning issue for...