To conservatives, the biggest strike against Mitt Romney is the health care plan he put in place in Massachusetts, but Newt Gingrich lavished praise on Romney’s plan after it was passed in 2006. “We agree entirely with Governor Romney and Massachusetts legislators that our goal should be 100 percent insurance coverage for all Americans,” Gingrich wrote in 2006. And, Gingrich wrote, the key to achieving that goal was doing what Romney did in Massachusetts: Requiring everybody...