Elon Musk attacks NASA leader over threat to reconsider lunar contract

Elon Musk lashed out this week at Transportation Secretary Sean Duffy, the latest sign of the billionaire’s willingness to take aim at the administration he once served, particularly when it potentially affects his bottom line.

Over the past few days, Musk has lobbed insults at Duffy, who has been serving as the acting administrator of the National Aeronautics and Space Administration, accusing him of lacking intelligence, trying to dismantle NASA and putting astronauts in danger of being killed.

The tirade, which he issued in a series of posts on his…