Election races around the country are entering the home stretch, with fewer than three weeks left before voters go to the polls. John Ydstie examines three key contests. To talk about the New Hampshire governor's race, he's joined by Laura Knoy of New Hampshire Public Radio. Tyler Bridges, political reporter for The Miami Herald, tells John about the Florida governor's race. And David Yepsen, political reporter for The Des Moines Register, talks to John about the campaign for Iowa's Second District congressional seat.