The most obnoxious spin of the 2016 campaign came this week, as Democrats, their media allies and even President Obama accused the FBI of stacking the election. It’s an extraordinary claim, coming as it does from the same crew that has—we now know—been stacking the election all along in the corridors of the Justice Department.

This is the true November surprise. For four months, FBI Director James Comey has been the public face of the investigation into Hillary Clinton’s email server. He played that role so well, putting...