The party of Lincoln is dead. A half century after the civil rights backlash begat Richard Nixon’s southern strategy, Donald Trump announced on Fox News that his accomplishments may have surpassed those of the 16th president. “So, I think I’ve done more for the black community than any other president, and let’s take a pass on Abraham Lincoln, ’cause he did good, although it’s always questionable.” Descendants of those freed from slavery under Lincoln? They would probably differ. Trump grew up in Queens, a New York borough, but his heart belongs to Dixie. He called the Confederate Robert E Lee...