https://www.nytimes.com/2023/06/20/opinion/ezra-klein-podcas...
It does not make Kean and Grusch's claims sound a lot more credible. Some of Kean's sources are proponents of things like psychic teleportation. Another is a Stanford biologist who started producing debunked materials science papers about allegedly alien artifacts (that turn out to look a lot like ordinary machine parts). No source she names has firsthand knowledge of "non-human origin" technology; it's all people who heard something who heard something. At one point she cites the now-discredited "Gimball Video". There's no good answer to the question of "if Grusch is right about any of this, why did the DoD allow him to say it publicly" --- she has a particularly harebrained theory that DoD classification rules allow Grusch to describe this stuff in generalities as long as he doesn't cross a line of specificity, which, just, no.
But people love talking about this stuff, so you can't blame Rubio for indulging it.