" In 1960, when a survey asked American adults whether it would “disturb” them if their child married a member of the other political party, no more than 5 percent of either party answered “yes.” But in 2010, 33 percent of Democrats and 40 percent of Republicans answered “yes.” In fact, partyism, as some call it, now beats race as the source of divisive prejudice. "

― Arlie Russell Hochschild , Strangers in Their Own Land: Anger and Mourning on the American Right