NBC is to announce on Monday morning that it has hired Chelsea Clinton to become a full-time special correspondent for NBC News.Ramin Talaie/Bloomberg News Chelsea Clinton will be a special correspondent for NBC News. The appointment is immediate. Ms. Clinton will show up at the news division offices on Monday morning, said Steve Capus, president of NBC News, and will begin work on stories that NBC expects to use as part of its “Making a Difference” series, which runs on “NBC Nightly News.” Ms. Clinton has been a national figure since her father won the presidency in 1992, but...