Prime Minister Mark Carney and Ukrainian President Volodymyr Zelenskyy spoke by phone Monday, reaffirming their agreement that Ukraine must be a party to any discussions about a possible end to the war in that country.

Touching on Ukrainian anxieties that a direct meeting between Mr. Trump and Putin could marginalize Kyiv and European interests, Zelenskyy said: "Any decisions that are without Ukraine are at the same time decisions against peace. They will not bring anything. These are dead decisions. They will never work."