There are no hot-button American political topics mentioned either way there.
The last time I was at a SF convention there was a wide variety of political views among attendees, just as there have been among award-winning SF authors. BasedCon seems unusual not in what sort of views it permits but in what it explicitly rejects.
Compare the "about" page for the more mainstream Worldcon with the one for BasedCon:
https://www.worldcon.org/about-worldcon/
https://www.basedcon.com/?page_id=85
BasedCon's "about" has hot takes on guns, socialism, abortion, etc. Worldcon's "about" doesn't say anything about those topics at all.
Here's the Registration FAQ for next year's Worldcon in Glasgow:
https://glasgow2024.org/get-involved/registration-faq/
There are no hot-button American political topics mentioned either way there.
The last time I was at a SF convention there was a wide variety of political views among attendees, just as there have been among award-winning SF authors. BasedCon seems unusual not in what sort of views it permits but in what it explicitly rejects.