President Donald Trump will soon announce a new candidate to serve as administrator of NASA, the White House said on Saturday, but did not explain why initial nominee Jared Isaacman was no longer in the running, Reuters reports.Washington Post: “Isaacman, a billionaire entrepreneur, had been approved by the Senate Commerce Committee and was preparing for a vote in the full Senate as early as next week. But on Friday he was told that the nomination was going to be pulled.”