West Wing officials managing the hunt have enlisted the help of the White House IT office, and believe they are making progress in narrowing the search for potential suspects. One Trump official said the culprit is likely a career government employee who works in the White House, not a person appointed by Trump himself, but did not offer specific evidence.

The search has been approved by the office of acting chief of staff Mick Mulvaney, and Trump himself — who has been infuriated by leaks from within his White House — is aware of the mole hunt and supports the effort, according to one of the officials…

Although officials have suspects in mind, they say it is too soon to implicate anyone with high confidence. “Both career and political staff receive the daily public schedule, but I want to be very careful that we don’t try anyone in the press,” said one of the officials.