Nothing in the hysteria over last week's Democratic debate – including the unprecedented opprobrium press critics heaped on the ABC moderators – should have come as any surprise. That doesn't make it any less fascinating a guide to current strange notions of what is and is not a substantive issue in a presidential contest, or any less striking an indicator of the delicate treatment Mr. Obama's media following have come to consider his just due.

Moderators Charles Gibson's and George Stephanopoulos's offense was...