A secret Pentagon program researching the existence of UFOs is not on the White House's radar.

“Somehow that question hasn’t come up in our back and forth over the past couple of days," Sanders said during her daily press briefing. "But I’ll ask and circle back."

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Sanders also refused to answer whether the president believes in the existence of UFOs.

The spokeswoman was briefly taken aback when the reporter's Siri function activated on his phone when he asked the question.

“I don't know if that's a coincidence or not. I feel like I already want to pass on this question, given that you’ve got aliens sitting among you," Sanders joked.

The question of extraterrestrial life was thrust back into the spotlight after The New York Times and other outlets reported that the Pentagon ran a $22 million program to investigate UFO sightings.

The existence of the shadowy program surprised many, since the federal government has insisted for decades the subject is not worth studying.

The director of the program, Luis Elizondo, recently resigned to protest what he said was excessive secrecy and lack of internal support for the research.