From the UK perspective, Trump round 2 is going to be particuarly amusing, and to give some context - it's because a few weeks ago, he accused the British government, currently led by the Labour Party, of interfering in the presidential election campaign for Team Harris.
This is funny not because that "Trump=Russian agent" crap, but because a) Members of the Labour Party were actually going across the pond to canvass for the Harris campaign b) It is well understood, as in not even an open secret, that there is a cross-pollination in terms of policy, political strategy, donors, etc. between the left liberal parties of the Anglosphere especially between the US and the UK that has been going on for decades so Labour activists in Pennysylvania or whatever is not only nothing new but the least interesting thing about the UK Labour-US Democrat link c) Because of b), Labour were looking to consolidate a revival of the Atlanticist model that defined the 1990s-2000s: a liberal internationalism (and as implied, with features of 'humanitarian interventionism') informed by an echo of third-way politics with Starmer representing a reiteration of New Labour and Harris for the New Democrats. This liberal internationalism persisted, and was even strengthened during the Bush presidency, and New Labour itself became a vector for neoconservative advisors. Labour's 'progressive realism' was supposed to underpin this, but Trump's victory undermines it completely as he conceives of no reason to even pretend that the UK is even a junior partner to the US, but a lackey to call on when necessary.
British foreign policy has since World War II been mostly about how to come to terms with the loss of its geopolitical standing as paramount hegemon - and what was most important to it since then is at least hedging closely to American imperialism, and presenting outwardly that the UK's interests are in accordance with the US. If Trump's approach to foreign policy is repeated in his second presidency, then it suggests that not only will there be a malformed iteration of Atlanticism due to the UK's and specifically the Labour government's insistence on maintaining the so-called "special relationship" in spite of so many of its MPs and even the Mayor of London having expressed personal disdain for Trump, it also potentially problematises the coordinated operations of Western imperialism currently taking place, or about to take place.
All of this presents decline of not just the American empire, but also accelerates that of the British one as well. The whinging of the British ruling class about 'sacrifices made' over Afghanistan three years ago have made that clear that this process was happening. With this, the UK is locked in the black hole of American decline, and in light of European imperialism now openly stating that they wish to strike out on their own - it is entirely a desicion of their own accord.
