Over the past 15 years or so, Democrats have won a lot of races because the opposing party’s primary voters decided to nominate right-wing ideologues (Christine O’Donnell, Todd Akin, Kari Lake) rather than normal Republicans. In all of these races, the Republican establishment warned that nominating an archconservative would undermine their chances of victory, and was proved completely correct. Now Democrats finally have the chance to do the same thing. In Michigan, a purple state that Donald