President Donald Trump's nominee to lead NASA, entrepreneur Jared Isaacman, faced questions from senators on Wednesday about his ties to Elon Musk and how he would balance Trump's focus on reaching Mars with the U.

Jared Isaacman, a billionaire entrepreneur who has twice launched to orbit in a SpaceX vehicle, faced pointed questions from senators of both parties before the Senate on Wednesday.

President Donald Trump’s nominee to run NASA will tell US senators the agency’s priority will be to send US astronauts to Mars, while promoting a thriving space economy in orbit.