Pete Buttigieg is dropping out of the 2020 presidential primary race, a senior campaign aide told CNBC. He is flying to South Bend, Indiana to make the announcement, where he served as mayor for two terms. The Indiana Democrat waged an unlikely campaign that saw a little-known mayor overpower governors and U.S. senators in the race for the party nomination. Along the way, Buttigieg assembled a substantial war chest and a vast national operation. A two-term mayor of South Bend, Indiana, Buttigieg was the first openly gay major presidential contender. He scored a narrow delegate edge over Sen. Bernie Sanders...