"It has served its purpose. There is very little incremental utility. Let's go to Mars."Start the day smarter. Get all the news you need in your inbox each morning. Musk's comments could carry significant weight considering his role as a close confidante of President Donald Trump and the leader of the Department of Government Efficiency,

As chairman of the US Senate Committee on Commerce, Science, & Transportation, Cruz effectively has control over Isaacman's confirmation process. He was also just re-elected to a six-year term, so theoretically Cruz is less susceptible to political pressure from the Trump White House.