Active kernel contributors are spread all around the world, with a pretty even distribution across USA, Western Europe and Asia.
Your suggestion that the US government would lean on the citizenship of Torvalds in order to exert control over the kernel should be laughable but I concede that anything is possible these days.
It is not laughable, Linux directly complies with SDN list[1] and US sanction policy(i.e. removing of russian developers by Linus). Thus, US does have and execute control over Linux kernel currently.
[1] https://www.linuxfoundation.org/blog/navigating-global-regul...
Yeah, Nah, 0 chance.
Linus Torvalds, imo, is the reason we have open source, through Linux & Git. He’s the open source philosopher king.
I think he’s put enough in to know where his allegiance lies, over a 2010 US citizenship - a very different world.
There is also 0 chance, US/MS government hasn’t put a lot of pressure on him over the last 34 years of creating and spreading, at least the OS form of socialism