"A Donald Trump-Mitt Romney showdown in New Hampshire Looks like Donald Trump's win-the-birthers strategy is working in New Hampshire — and that’s coming at the expense of front-runner Mitt Romney. Romney leads the first-in-the-nation primary contest in a multitude of scenarios involving difference candidates, often by as much as a 2-1 margin, according to a survey out Tuesday from Public Policy Polling. But when Trump gets into the race, Romney’s edge shrinks to 6 points, 27 percent to 21 percent. If Trump isn't included in the survey, Romney draws 32 percent of the vote, with Mike Huckabee a distant second...