CONCORD, N.H. - A man walks into Perfecto's Caffee in Andover, Mass., proclaims his support for John McCain, then, inexplicably, orders a gingerbread man frosted to resemble Barack Obama. "I don't need a bag," he tells owner Max Gabriello, then bites the head off the cookie and throws the rest in the trash. "That's what I think of Obama." At a time when the negative tone of the presidential race is enough to turn anyone's stomach, Mr. Gabriello and like-minded bakers, chefs and bartenders hope voters save some room for food and drinks resembling, named for or inspired by the...