If the exact same incidents had occurred in the exact same order, and if it had happened during the watch of a conservative president, it would be a treated as a scandal. An epic one, in fact. The coverage, starting on September 12 and starting with Mr. Friedman’s newspaper, would have been nonstop, ferociously negative, and the pressure put on the president and his administration would have been crushing. Jon Stewart, the moral conscience of an increasing number of journalists, wouldn’t have let this story die.

Yet President Obama avoided all of that. Indeed, it was Mitt Romney who incurred the special wrath of reporters for his criticism of a statement made by the American embassy in Egypt after the building was stormed by an angry mob (a criticism, by that way, that the Obama administration agreed with a few hours after Mr. Romney made it). Most reporters—again, with a few impressive exceptions—treated the Benghazi story with nonchalance.

For some journalists, it’s fairly clear as to why: they had a rooting interest in Mr. Obama winning and they carried a deep dislike, even contempt, for Governor Romney. But for many others I think the explanation is more subtle and in some respects more problematic. They appear to be completely blind to their biases and double standards. If you gave them sodium pentothal, they would say they were being objective. Self-examination, it turns out, is harder than self-justification. And of course being surrounded with people who share and reinforce your presuppositions and worldview doesn’t help matters.