Now it turns out that there was a third uninvited guest at the White House state dinner for Indian Prime Minister Manmohan Singh, this one a member of the Indian delegation. It was enough of a shock that the would-be stars Tareq and Michaele Salahi had crashed. But a third? The Salahi story may have been delicious, but the implications of the appalling breach of security are immense. The president could have been assassinated. And had that happened, the Office of the White House Social Secretary would have been as culpable as the Secret Service.

One of the first lessons any administration needs to learn is that somebody has to take the hit for whatever goes wrong. If another culprit is not identified, the president gets the blame. One incident after another in the past few...