REUTERS

Under this scenario, the country's top diplomat would absorb the national security adviser role and do both jobs, according to a senior administration official and a source familiar with the possibilities, CNN reported.

That would make Pompeo the second person in history to have both jobs at the same time. The first, Henry Kissinger, was already President Richard Nixon's national security adviser when he was appointed secretary of state in 1973, and filled both roles for two years.

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It's unclear how seriously Trump is considering this possibility, and a source familiar with the process says that Pompeo has given the President a list of other names to consider. On Wednesday, when asked about his top picks to replace Bolton, the President said, "I have five people that want it very much... Five people that I consider very highly qualified, good people."

Asked if he was caught off guard by the firing of John Bolton, Pompeo replied: "m never surprised," according to The Guardian.