In a surprise move, President Donald Trump withdrew his nomination of Jared Isaacman to lead NASA. The private astronaut’s prospective role as NASA administrator was seen by the space community as a welcomed change to the agency during a critical time,

During a podcast appearance, the Shift4 CEO claims “some people that had some axes to grind” were responsible for the move.

Isaacman is no longer in the running for NASA leadership. Trump will pick a new option for NASA administrator, White House said.