AFTER A 50-YEAR siege, the great strategic fortress of liberalism has fallen. With the elevation of Judge Brett Kavanaugh, the Supreme Court seems secure for constitutionalism — perhaps for decades. The shrieks from the gallery of the Senate chamber as the vote came in last Saturday, and the sight of that bawling mob clawing at the doors of the Supreme Court as the new justice took his oath, confirm it. The Democratic Party has sustained a historic defeat. And the triumph is President Trump’s. To unite the party whose nomination he had won, Donald Trump pledged to select his high...