President Donald Trump is withdrawing the nomination of tech billionaire Jared Isaacman, an associate of Elon Musk, to lead NASA. That’s according to a person familiar with the Trump administration’s personnel decisions. The individual was not authorized to comment publicly. The White House and NASA did not immediately respond Saturday to requests for comment. Trump announced during the transition that he had chosen Isaacman for the space agency’s top job. Isaacman is the founder and CEO of a credit card processing company. Isaacman also bought a series of spaceflights from Elon Musk’s SpaceX and conducted the first private spacewalk. Musk is a Trump adviser.