Republicans recently have watched multiple Romneys at war with each other over abortion, ethanol, global warming, and more. Alas, this is nothing new. Various Romneys have battled themselves on issues as old as the Vietnam War. “I longed in many respects to actually be in Vietnam and be representing our country there and in some ways it was frustrating not to feel like I was there as part of the troops that were fighting in Vietnam,” Hawkish Romney said in the June 24, 2007, Boston Globe while running as a conservative for 2008’s GOP nomination. But Romney sang a softer...