Every individual who’s ever run for president of the United States should expect the security detail assigned to guard the first family to be the best in the world at doing that job.

Not “one of the best,” but the very best. The tops. No. 1. The all-time champs.

The revelations about Omar Gonzalez bursting into the White House and then cavorting through the mansion before being caught by a security guard is troubling in the extreme.

Yes, these things have happened before. And yes, given that the Secret Service is populated by fallible human beings, there might be times when even the most secure network on the planet breaks down.

But this is frightening in the extreme?

Some heads needs to roll at the Secret Service.

Are you paying attention here, Treasury Secretary Jack Lew, under whose command the Secret Service operates?

Julia Pierson heads the Secret Service. She needs to answer some serious questions about what went wrong. So does the individual who’s in charge of the White House security detail. To date, we aren’t hearing much from these individuals, as they cite an “ongoing investigation” as the reason for their relative silence.

I wouldn’t make so much of this matter, except that the Secret Service in recent years has been caught doing some highly unprofessional things — such as the episode about three years ago when agents were, um, enjoying the company of hookers in South America while doing security advance work for an upcoming presidential visit.

Now this. Omar Gonzalez not only broke through the perimeter but the knife-wielding intruder was able to penetrate deeply into the building.

Failure to secure the house where the first family lives is a disgrace.