Chasten Buttigieg has emerged as a star in the Democratic primary, becoming a key part of his husband Pete Buttigieg's campaign and helping the South Bend, Ind., mayor stand out in a crowded field. The 29-year-old school humanities and drama junior high teacher from Michigan not only functions as a much sought-after campaign spokesman and adviser, but he is also helping humanize the first gay major presidential candidate in a country that only legalized same-sex marriage four years ago.