How the Michigan Senate primary activated every bitter Democratic grudge

Rep. Alexandria Ocasio-Cortez (D-NY), Michigan Democratic candidate for Senate Abdul El-Sayed and Sen. Bernie Sanders (I-VT) greet the crowd after El-Sayed spoke at a rally on July 18, in Detroit, Michigan. | Sarah Rice/Getty Images A decade’s worth of grudges and feuds between the Democratic establishment and the insurgent left is coming to a head in one election this year: Michigan’s Senate primary. Key takeaways Many long-simmering grudges between the establishment Democratic Party faction…