President Donald Trump announced late Saturday he was pulling the nomination of Jared Isaacman to lead the NASA space program, promising a new pick soon who would be "mission aligned."

Isaacson is a billionaire tech entrepreneur who led Shift4 payments, a credit card payment processing company. He testified recently in his Senate confirmation hearing.

Trump suggested in a Truth Social post Saturday night that he and Isaacman were not fully aligned on vision for the space agency.

"After a thorough review of prior associations, I am hereby withdrawing the nomination of Jared Isaacman to head NASA," the president wrote. "I will soon announce a new Nominee who will be Mission aligned, and put America First in Space. Thank you for your attention to this matter!"