President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE in 2017 offered unlimited funding to NASA to send a manned flight to Mars, according to an upcoming book.

Prior to a phone call with NASA astronaut Peggy Whitson from the Oval Office in April 2017, Trump pressed Robert Lightfoot Jr., then the acting NASA administrator, for NASA's plans for Mars, New York Magazine reported Tuesday, citing an advance copy of Cliff Sims's upcoming book "Team of Vipers."

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“Is there any way we could do it by the end of my first term?” Trump reportedly asked Lightfoot, who explained to the president that NASA planned to try a manned spaceflight by the 2030s and that there were logistical challenges of doing so before then.

Trump then offered Lightfoot "all the money you could ever need," according to New York Magazine's reporting on Sims's book.

“But what if I gave you all the money you could ever need to do it?” Trump asked. “What if we sent NASA’s budget through the roof, but focused entirely on that instead of whatever else you’re doing now. Could it work then?”

Lightfoot reportedly responded to the president by telling him he didn't think that was possible. That left Trump "visibly disappointed," wrote Sims, a former White House communications staffer.

Trump also pressed the issue during the phone call with Whitson, saying that he wanted to get humans on Mars "at worst, during my second term."