The New York Times reported the lead producer of the documentary series “American Masters” insisted on removing a scene critical of President Trump from a documentary about the comic artist Art Spiegelman two weeks before it was set to air nationwide on public television stations. The series is produced by the WNET Group of New York City public TV stations. In a statement, Art Spiegelman wrote, “It’s tragic and appalling that PBS and WNET are willing to become collaborators with the sinister forces trying to muzzle free speech.”