Just a week after entering the presidential race, Mayor Bill de Blasio is already neck-and-neck with such household names as . . . Seth Moulton and Wayne Messam. How long before he puts an end to this farce?

The mayor is struggling to crack the top 20 (out of 23) so he can qualify for the first Democratic debate next month and admits, “I’m not setting the expectation that I’ll be in it.”

Among other tests, he needs to hit 1% in three serious polls (as judged by the Democratic National Committee), plus meet fundraising targets, such as getting 200 donors from at least 20 different states.

De Blasio’s first excuse will be that he’s such a late entry. But showing up late (and often uninvited) is his signature move. How is it not his own darn fault this time?