It’s Time to Unite Around the Constitution—Hey, GOP, That Means You

No Republican president has ever been so thoroughly at odds with the GOP’s “Party of Lincoln” history as Donald Trump. Abraham Lincoln, the first Republican president, led the Civil War fight to end the Confederate rebellion against the United States. Trump, who seems to be bent upon making himself the last Republican president, has been making excuses for the Confederacy since the first months of his tenure.

Now, as Trump faces the prospect of impeachment, he is casually retweeting references to the prospect of a Civil War breaking out if...