Republican Newt Gingrich drew an overflow crowd to a small welcome center in this mountain town 50 miles from the Canadian border and tried to delineate unmistakable differences between himself and frontrunner Mitt Romney. New Hampshire may be one of Romney’s strongest states on the road to the Republican nomination for president, Gingrich said, but that made it the perfect setting to scrutinize the real record of the former Massachusetts governor. “I think it’s also the best state to explain the difference between the values of conservatism and the values of a Massachusetts moderate,” Gingrich said.