Some ghost of Lincoln haunted President Biden’s inaugural address on Wednesday. Granted, Mr. Biden faces no military reversals. On the other hand, he delivered his speech at a crime scene, the west front of the U.S. Capitol, which, not three weeks ago, was breached by a howling mob of traitors, white supremacists and goons all too starkly reflective of what the Republican Party has devolved to. That deadly event, plus political reality and maybe even common sense, all inveigh heavily against the theme of the new president’s inaugural address. Which, like Lincoln’s first inaugural address, was union.