President Donald Trump has reinstated Jared Isaacman as the nominee to lead NASA, reversing his earlier decision to withdraw the nomination. The billionaire entrepreneur and private astronaut, who is also an ally of Elon Musk, had been nominated to head the space agency but was pulled from consideration in June. Trump’s decision to reinstate Isaacman follows a change of heart after initially withdrawing the nomination due to concerns over Isaacman’s political contributions to Democratic campaigns.