Mr. Trump’s opponents—from the media to Joe Biden—have planted the thought that he won’t accept the results or would try to put off the vote. How he helps himself by keeping such disruption narratives in the public’s mind remains a mystery.

Still, a question: Why are Democrats and the press so unconcerned about whether state election authorities are prepared to conduct a credible election amid the pandemic? The conventional wisdom, inserted in every story on this subject, is that there is no evidence of significant fraud in mail-in elections, that many states have used mailed ballots for years without serious incident.

Yet it strikes us as bordering on the fantastic for a media that has reported the extraordinary dislocations of the pandemic—lockdowns, death, virus spikes—to blandly say voting in a major election using the U.S. Postal Service is no problem. Paterson, N.J., recently disqualified 20% of its mailed ballots.