Copyright Bloomberg

Welcome to Balance of Power, bringing you the latest in global politics. If you haven’t yet, sign up here. When world leaders meet in Johannesburg this month, it looks increasingly likely that major powers will be missing — and not just the US. President Donald Trump has escalated a months-long spat into a full diplomatic walkout with his weekend announcement that his administration won’t send any representative to the Group of 20 summit. He’d already bailed, and plans for Vice President JD Vance to attend are now canceled too.