Just one day before the New Hampshire primary, a letter from the FBI has surfaced calling the probe into Hillary Clinton’s secret email server an “ongoing law enforcement effort.” This certainly doesn’t fit the answer Clinton gave at last week’s Democratic debate, where Clinton told moderator Chuck Todd that there was no investigation but rather a “security review” that would eventually involve a number of people, “because we’ve got this absurd situation of retroactive classifications.”

According to MSNBC, the FBI said last fall that it could neither confirm nor deny the existence of any investigation. After watchdog Judicial Watch filed a freedom of information request, it received a document confirming the investigation, saying it is “working on matters related to former Secretary Clinton’s use of a private email server.”

The single paragraph concludes by saying that the FBI cannon say more “without adversely affecting ongoing law enforcement efforts.”

The world’s worst kept secret? Perhaps. But it’s also confirmation that this is no “routine security review” as Clinton has claimed more than once.

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Update: It’s a subtle point, but the Wall Street Journal’s Byron Tau reports that the letter confirms the FBI is looking into Hillary Clinton’s use of a private server.