It was early fall, and Donald J. Trump, behind in the polls, seemed to be preparing a rationale in case a winner like him somehow managed to lose. “I’m afraid the election is going to be rigged, I have to be honest,” the Republican nominee told a riled-up crowd in Columbus, Ohio. He was hearing “more and more” about evidence of rigging, he added, leaving the details to his supporters’ imagination.
A few weeks later, Cameron Harris, a new college graduate with a fervent interest in Maryland Republican politics and a need for cash, sat down at the kitchen table in his apartment to fill in the details Mr. Trump had left out. In a dubious art just coming into its prime, this bogus story would be his masterpiece.