Moderate Democrats also lost presidential elections in 1980, 2000, 2004, and 2016. Since McGovern, moderate Democrats have a losing record in presidential elections: six losses to the five wins by Jimmy Carter, Bill Clinton, and Barack Obama (who ran a more progressive primary campaign than Hillary Clinton in 2008). But this history is lost in discussions of electability. It is as if moderate nominees are undefeated. It is as if the last time a Democrat lost was when the party nominated McGovern in 1972.
Good counter argument to baffling calls to rally around moderate candidates like Buttigieg and Klobuchar instead of the progressive candidates like Sanders (and Warren to a lesser extant) that actually inspire Democratic voters.