On good-bye tour, Gingrich touts ability to be Romney surrogate By NBC's Andrew Rafferty MOORESVILLE, NC -- Even though his presidential campaign "will go bye-bye," Newt Gingrich on Thursday said he and his wife plan to campaign through the fall to help presumptive nominee Mitt Romney. "I'm going to look at how I can be helpful, because I suspect people will still show up to hear me," Gingrich told voters at luncheon here. "Callista and I are going to campaign through October." Though today, just 25 people attended the midday event here, leaving a roomful of empty chairs. Some of...