The filmmakers behind a new documentary briefly discussed their “deeply troubling” experience with public TV in an appearance on public radio’s On Point Wednesday. Tia Lessin and Carl Deal directed Citizen Koch, now hitting theaters after vying for grant funding and a broadcast commitment from PBS’s Independent Lens. The film examines the influence of wealthy conservatives such as David and Charles Koch on Republican politics. A May 2013 article by the New Yorker’s Jane Mayer suggested that ITVS, Independent Lens’s producer, backed away from the film due to pressure from New York’s WNET, where David Koch sat on the board. Appearing on On Point, Lessin and Deal said ITVS asked them to remove content related to the Kochs from their film and to change the name.