Donald Trump with Vladimir Putin in 2017.Donald Trump has said he is “pissed off” with Vladimir Putin as his attempts to broker a ceasefire between Russia and Ukraine drag on.The US president said he was “very angry” at his Russian counterpart for suggesting Volodymyr Zelenskyy should be replaced as Ukraine’s leader.He also said he would impose tariffs on Russian imports if a ceasefire is not agreed within a month.Zelenskyy has agreed to an unconditional 30-day truce in the war, but Putin has so far refused to follow suit.Instead, the Russian president has made a series of demands in return for a partial ceasefire.In an interview with NBC News, Trump said: “If Russia and I are unable to make a deal on stopping the bloodshed in Ukraine, and if I think it was Russia’s fault - which it might not be... I am going to put secondary tariffs... on all oil coming out of Russia.”On Putin’s call for Zelenskyy to be replaced, the president said: “You could say that I was very angry, pissed off, when... Putin started getting into Zelensky’s credibility, because that’s not going in the right location.