After Trump pulled NASA nomination, Musk ally Jared Isaacman says stint in politics was 'thrilling'

1. Jared Isaacman resigns as CEO of Shift4 Payments, becomes executive chairman. 2. His nomination for NASA was withdrawn by Trump amid controversy. 3. Isaacman remains Shift4's largest shareholder, emphasizing continued commitment. 4. Shift4 invested $27.5 million in SpaceX, indicating strong ties. 5. Musk's critique of Trump's policies could affect associated companies.