If you have used Reddit for some time, you’ll have noticed an interesting trend: any large space where general content is allowed to be posted and which does not prohibit US politics, will generally become saturated with US politics.

This happens to some degree on Lemmy as well. It’s because Americans are the largest national demographic group on the English-speaking portion of the Internet, and because American politics in general is extreme and garners a lot of attention from others. So if talking about it is allowed, it will usually become all that anyone ever wants to talk about, or at least it will appear that way in a space where popularity determines visibility.