The current battle over President Obama’s Supreme Court nomination of Merrick Garland is child’s play compared with the lurid brawl over George H.W. Bush’s nomination of Clarence Thomas 25 years ago. On Saturday, HBO marked the quarter-century anniversary with “Confirmation,” a retelling of how Judge Thomas, a conservative, up-from-poverty black jurist from Pinpoint, Ga., saw his nomination nearly derailed by allegations of sexual harassment made by Anita Hill, a black attorney who had worked for him 10 years earlier.

Ms....