No primary—especially a Senate primary—should go on this long. But Michigan’s Democratic Senate primary, having dragged on for months, has turned into an interminably vicious grudge fest—one that’s not likely to subside until voters finally go to the polls on August 4 and choose between Haley Stevens and Abdul El-Sayed.But the Michigan primary is also so bitter for the same reason that it has been so interesting. Of all of the 2026 races, this is the one that best captures the current fissures in the Democratic Party—and which seems to best predict where the fault lines of the 2028 presidential...