OPINION | ROBERT STEINBUCH: Shut your mouth

Recently I wrote about a guest column from former first ladies who asked Arkansas public television to move "PBS NewsHour" back to 6 p.m. (from 10 p.m.) and restore "Washington Week with the Atlantic" to the broadcast lineup, rather than streaming only. I praised the former first ladies' fundraising, which was genuinely impressive--$2.1 million in about…