Senator Marco Rubio has cautioned European allies that NATO must be valuable to the US, not just Europe, and indicated that Trump's 'disappointment' with the alliance will be a summit topic. Rubio also discussed a 'Plan B' to reopen the Strait of Hormuz, suggesting NATO countries could contribute to such a mission, while Europe considers plans to replace US forces.

Ukrainian President Volodymyr Zelenskyy is confirmed to attend the annual NATO summit in Ankara in July, as NATO foreign ministers meet to discuss various issues including the war in Ukraine.