Photo — Elon Musk: Own work (CC BY 3.0) · Sean Duffy: https://www.flickr.com/photos/nasahqphoto/54687553708/ (Public domain)
The Short Version
In October 2025, SpaceX CEO Elon Musk engaged in a public dispute with U.S. Transportation Secretary and acting NASA Administrator Sean Duffy after Duffy announced NASA would reopen lunar lander contract bidding for the Artemis mission due to SpaceX timeline delays.
Latest Development
Duffy tours Musk's Boring Company project in Nashville
Transportation Secretary Sean Duffy visited Nashville to tour The Boring Company's Music City Loop tunnel project, offering praise for the private transportation initiative.
June 25, 2026 · Verified event
The Beef
Chronological, newest first. Every entry cites a source.
Beef timeline
June 25, 2026
Duffy tours Musk's Boring Company project in Nashville
Verified eventTransportation Secretary Sean Duffy visited Nashville to tour The Boring Company's Music City Loop tunnel project, offering praise for the private transportation initiative.
Source ↗October 21, 2025
Musk criticizes Duffy in series of social media posts
Public statementElon Musk posted multiple messages on X criticizing Duffy, referring to him as 'Sean Dummy', alleging he was 'trying to kill NASA', and questioning his qualifications. Duffy responded on X stating that competition among innovators benefits the country.
Source ↗October 20, 2025
Duffy announces NASA will reopen Artemis contract proposals
Public statementActing NASA Administrator Sean Duffy stated in media interviews that NASA was opening up the Artemis III moon lander contract to SpaceX competitors such as Blue Origin, citing schedule delays in SpaceX's development timeline.
Source ↗July 9, 2025
Trump appoints Sean Duffy as interim NASA administrator
Verified eventPresident Donald Trump announced via Truth Social that Transportation Secretary Sean Duffy would serve as interim NASA administrator, replacing Musk ally Jared Isaacman whose nomination was withdrawn.
Source ↗
Where It Stands
Cooling Off. Tensions appeared to ease by mid-2026 when Duffy toured and publicly praised an underground tunnel project built by Musk's Boring Company in Nashville.
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Sources
- 1.SourceDuffy tours Musk's Boring Company project in Nashville · Jun 25, 2026
- 2.SourceMusk criticizes Duffy in series of social media posts · Oct 21, 2025
- 3.SourceDuffy announces NASA will reopen Artemis contract proposals · Oct 20, 2025
- 4.SourceTrump appoints Sean Duffy as interim NASA administrator · Jul 9, 2025
Allegations are attributed to the party that made them and are not statements of fact.