Democrats have done a hell of a job dividing the country by skin color, gender, sexuality, income, you name it. They thrive in that division the way bacteria thrive in a dirty wound. On race, Democrats struck their gold, and now the country is in turmoil while they’re hoping to reap the benefits. None of the other options – gender, sexuality, income, etc. – carry the weight that race does. They’re useful for Democrats in small skirmishes, but for larger, nationwide struggles, race is always where it’s at for them. It’s their favorite medium; they work in it the way...