US President Donald Trump said Ukraine’s hopes of retaking Crimea and joining NATO are no longer negotiable, telling President Volodymyr Zelensky he could end the war with Russia “almost immediately” by embracing those concessions. The ultimatum, delivered on social media ahead of Monday’s White House talks, marks the clearest alignment yet between Washington and Moscow on key territorial issues. Zelensky arrived in Washington on Sunday night flanked by seven European leaders and NATO Secretary-General-designate Mark Rutte. The Ukrainian leader reiterated that Kyiv seeks a ‘durable’ peace backed by robust US-European security guarantees, but insisted Russia must halt its aggression and that Ukraine will not accept imposed territorial losses. Trump and Zelensky are scheduled to meet privately at 1 p.m. ET, before a joint working dinner with French President Emmanuel Macron, UK Prime Minister Keir Starmer and other EU leaders. Diplomats said discussions will test whether an alternative security framework can substitute for NATO membership while satisfying Russia’s demand for a neutral Ukraine. The high-stakes gathering follows Trump’s summit with Vladimir Putin in Alaska, which produced no cease-fire but prompted talk of a US-EU guarantee for Ukraine modelled on NATO’s collective-defence clause. As leaders converge on Washington, Russia continued overnight strikes, killing at least six civilians in Kharkiv and underscoring the urgency—and complexity—of any proposed settlement.