By Jeff Cohen ainstream news outlets keep pounding home the same message — that the “Democratic establishment” or “Democratic moderates” are worried sick that Bernie Sanders can’t beat Trump. They worry about a Trump landslide, and a “down-ballot disaster” in Congressional races. Democratic insiders, we’re told, fear a re-run of 1972 — when progressive antiwar candidate George McGovern lost 49 of 50 states to Richard Nixon. Given our divided electoral map, with nearly 40 states safely blue or red, such a scenario in 2020 is thoroughly absurd. That didn’t stop now-ex-MSNBC host Chris…