The planned Quad Leaders' Summit in Sydney on 24 May has been derailed by the US debt ceiling crisis.
It's a regrettable cancellation as the meeting was due to take place at a crucial time (although the leaders have arranged to catch up on the sidelines of the G7 meeting this weekend).
More than a year after the start of the Russian invasion of Ukraine, it was to be the first, top-level opportunity to take stock of how cohesive the Quad is — a framework that is still evolving — as the previous leaders' summit only happened some three months after the start of the war.
