The historic political comeback of Donald Trump has left Democrats largely unable and unwilling to process what they’ve done to themselves. Yes, they whine and cry and emote, like wounded adolescent narcissists, because that’s all they can do. What of cold-eyed analysis that might compel them to make difficult choices and save what remains of their party? No. They’re afraid. That is beyond them now. They’re locked in their doom loop. In granting Trump the White House through an electoral college landslide and popular vote, American voters also made it clear that they were fed up with leftist ideology. This...