In 1972, Republican voters in Michigan decided to make a little mischief, crossing over to vote in the open Democratic primary and voting for segregationist Democrat George Wallace, seriously embarrassing the state's Democrats. In fact, a third of the voters (PDF) in the Democratic primary were Republican crossover votes. In 1988, Republican voters again crossed over, helping Jesse Jackson win the Democratic primary, helping rack up big margins for Jackson in Republican precincts. (Michigan Republicans can clearly be counted on to practice the worst of racial politics.) In 1998, Republicans helped Jack Kevorkian's lawyer -- quack Geoffrey Feiger -- win his Democratic primary, thus guaranteeing their hold on the governor's mansion that year.Kos is recommending payback this year, since the Democratic primary in Michigan apparently won't be binding this year.
Only a twisted mind could describe whites voting for a black man as 'the worst of racial politics'. If their earlier voting for a segregationist embarrassed Democrats, voting for JJ was probably the Michigan Republicans' effort to apologize for embarrassing them. :=)