Who is Jared Isaacman? Billionaire investor, close ally of Elon Musk re-nominated as NASA administrator by US President Donald Trump

U.S. President Donald Trump renominates Jared Isaacman, a close ally to Elon Musk, for the role of NASA administrator. This comes after Trump initially withdrew his nominations in May after high-profile 'public' falling out between Trump and Elon Musk.