Following the successful mission of SpaceX’s Inspiration4 CEO Elon Musk had a smart response for the lack of recognition of the civilian spaceflight by President Joe Biden.

When asked by one of his 60 million Twitter followers what his theory was on why the president refused to acknowledge the astronauts who returned to Earth on Saturday and who are helping to raise “hundreds of millions of dollars for St. Jude,” Musk took a shot at Biden.

Musk replied to the fan, “He’s still sleeping” – a tongue-in-cheek remark that may have referred to Biden references of “Sleepy Joe,” which former President Donald Trump often used to mock the then-candidate during the 2020 presidential campaign.

More recently, Israel’s former prime minister Benjamin Netanyahu suggested that Biden fell asleep during a meeting with the newly elected prime minister of Israel, Naftali Bennett, Reuters reported.

Biden has yet to congratulate the space team or Musk for their successful space flight. NASA extended accolades to Musk and SpaceX on the Inspiration4 mission. In addition, Blue Origin and rival Jeff Bezos also gave their congratulations on social media.

The American four-person flight crew was raising money for St. Jude Children’s Research Hospital with their mission of amassing $210 million, including $50 million pledged by Musk by the time the crew returned from its three days in orbit.

Overall, SpaceX has had a positive relationship with the federal government, winning a recent contract for $2.89 billion to build NASA’s next crewed lunar lander, CNBC reported. SpaceX beat out Bezos' Blue Origin and Leidos subsidiary Dynetics for the project, the news outlet said.

The Crew Dragon spaceship crew was comprised of a team that included the first Black woman to hold the position of spacecraft pilot, the youngest American astronaut, and the first person with a prosthesis to fly to space.

Elon Musk is the founder of SpaceX and Tesla Elon Musk, founder of SpaceX and Tesla, is pictured here. Photo: POOL / Britta Pedersen