Imagine that a Republican seeks his party's endorsement for the U.S. House of Representatives, despite having been allied with a white supremacist organization just a decade earlier. Imagine that this candidate had once sarcastically proposed setting aside certain states for white citizens and had shared a stage with a speaker known for excoriating Jews as "bloodsuckers." You're right. That man wouldn't get his party's endorsement. He would probably want to go into hiding after the howl of negative media coverage. So how did we get Keith Ellison? State Rep. Keith Ellison of Minneapolis is the DFL-endorsed candidate for the Fifth...