President Donald Trump said he would name a new nominee for NASA administrator, just days before billionaire Jared Isaacman, the current pick and a close ally of Elon Musk, was to face his planned Senate confirmation vote.

It wasn’t immediately clear why Trump was dropping the nomination of Isaacman, who had already been approved by the Senate Commerce Committee. Trump posted on Truth Social that he made the decision after a “thorough review of prior associations.”

Bloomberg News Space Reporter Loren Grush details the fallout from Trump’s decision and discusses what comes next for the space agency.