As the Republican presidential candidates jockeyed for votes during the first-in-the-nation Iowa caucuses on Monday, Vice President Kamala Harris was in South Carolina, shoring up support in a state that will kick off Democrats' primary season next month. "It's good to be back," Harris, who was making her second trip to South Carolina since the start of the new year, said before getting in her motorcade. ABC News was granted exclusive access to the vice president during her trip, getting a rare,