Elon Musk is not a fan of NASA Acting Administrator Sean Duffy.

The SpaceX founder and CEO has hammered Duffy repeatedly on social media over the past few days, calling him "Sean Dummy" (which he later amended to "Sean 'Dangerously Stupid' Dummy") and claiming that Duffy "is trying to kill NASA."

Musk also posted the following poll question on X: "Should someone whose biggest claim to fame is climbing trees be running America's space program?" That's a nod to Duffy's lumberjack past; he was active in timber sports in his youth and held two world speed-climbing titles by the age of 30.

This barrage didn't come out of left field. It followed on the heels of Duffy's announcement that NASA will reopen competition for the Artemis 3 moon-landing contract, which SpaceX won in April 2021. The c

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