KYIV — President Volodymyr Zelenskyy has said Ukraine must do all it can to ensure the war with Russia ends next year through diplomacy, commenting at a decisive moment after Donald Trump’s U.S. presidential election win and Russia’s grinding battlefield gains.

However, Zelenskyy said Russian President Vladimir Putin was not interested in agreeing to a peace deal, and argued it was convenient for Moscow to sit down to talk while continuing to fight.

“From our side, we must do…