(CNN) Acting Director of National Intelligence Joseph Maguire faces a deadline Tuesday to turn over a whistleblower complaint that was never alerted to the House Intelligence Committee, whose chairman says he confronted the DNI over the matter.

Maguire's office says they are reviewing the request, but House Intelligence Chairman Adam Schiff has said if the complaint is not turned over, he'll force the national intelligence chief to appear publicly before Congress later this week.

Schiff said on "Anderson Cooper 360" Monday night that the intelligence community inspector general's found the complaint to be "credible" and of "urgent concern," conditions that, Schiff says, require congressional notification.

The California Democrat told CNN's Anderson Cooper that he had found Maguire's answers on the matter to be "not very encouraging," noting that the newly installed acting DNI had initially answered "no" when asked if the complaint involved something the committee was investigating but was immediately corrected by his legal counsel, who said they "could not say that."

Schiff then issued a subpoena to Maguire on Friday demanding he produce all relevant details related to the complaint , an announcement that has sparked questions as to whether the administration may have violated whistleblower protections and whether the President or top White House officials were involved in the case.

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