European leaders have expressed concerns about potential changes to Ukraine's borders by force ahead of a summit involving Russia's Putin and US President Trump. They emphasized Ukraine's right to determine its future and the importance of territorial integrity. Hungary's Viktor Orban did not sign the statement, highlighting his pro-Russian stance. The EU remains committed to supporting Ukraine's defense and its path to EU membership, while concerns about Russia's aggression persist. Trump has suggested territory swaps in peace negotiations, raising further apprehensions among European leaders.