KOIN-TV’s videographers, photographers, engineers, directors, and other production staff have always worked hard to get Portland’s news out to television screens across the city. But for the last several years, employees have had to put up with more than grueling overnight shifts and the typical ups and downs of the news industry. Since massive media conglomerate Nexstar purchased KOIN in 2016, unionized production staff at the station say they’ve experienced relentless union-busting tactics from their...