Gregory's Server
ironically, it's American law (namely the First Amendment) which disallows whitehouse.gov (for example) from running a mastodon (or other #fediverse) instance. They would probably be, by law, disallowed from moderating bad posts/accounts.
Other countries don't have this legal limitation, which is why so many other governments have their own #fedi instances.
But yeah, not federating with threads, hell no. It speaks volumes about their influence on US politics now, too.