Donald Trump has declared it is “time for Ukraine to get a new President” in a blistering series of comments amid an intensifying row with Volodymyr Zelensky.The US leader was speaking just hours after he inked a major diesel deal with Russian President Vladimir Putin. “We said, you can do whatever you want to Russia. Don’t hit the refineries, because that’s a world problem that’s caused. And he wants to make problems for the world. “He wants to make problems for our farmers, our ranchers, with diesel fuel, because Russia supplies a large portion of the diesel fuel throughout the world. “We told them, do whatever you want, but don’t hit the diesel fuel because there’s a big problem, a big shortage. And what does he do? He goes and hits the diesel fuel. “So he’d better damn well stop,” the US leader stressed. Donald Trump has said it is ‘time for Ukraine to get a new President’ | REUTERS“And you know what I suggest? I suggest they get a new leader who can make a deal. Because he could have made many deals, and for some reason, he never does.”Russian oil refineries have been devastated by Ukraine’s successful drone and missile campaign against the invading power.This led the Kremlin to impose an export ban on diesel as it tried to respond to the strikes.Moscow’s move piled further pressure on the global energy market, still reeling from the Iran war and closure of the Strait of Hormuz.The US leader slammed President Zelensky over Ukraine’s campaign against Russian oil refineries | GETTYOn Friday, President Trump announced that Russia had agreed to supply “immediately more than 300,000 tonnes of diesel fuel” amid record-high prices for the product.He also said Washington would lift sanctions on Russian diesel to help make another 1.5 million tonnes available by year-end.On the day President Trump made the announcement, a gallon of diesel cost £4.74, up from £2.78 12 months earlier.As the US midterm elections approach, the US leader is under increasing pressure to bring domestic diesel prices under control.Donald Trump and Vladimir Putin have secured a diesel deal | GETTY“Zelensky is misreading the room,” a US official told Axios about the Kremlin deal. “By continuing to hit refineries, he is eroding the goodwill that he has built with Trump over the last six months.”President Zelensky blasted the move, branding it a “gift” to Russia and accusing Washington of demonstrating “weakness.”“I believe our team is simply being used as a cover. It is certainly not how partners should treat one another.“And in my view, this is a weak decision, unfortunately, a weak decision by strong partners. Gifts to Putin will not bring peace or any benefit to the civilised world.”He said that Russia had “expressed its thanks for the lifting of sanctions on diesel exports by dropping five glide bombs on residential buildings”.“In Russia, they take any easing of pressure to mean they can keep fighting, to mean they can keep dropping bombs on cities,” President Zelensky warned, adding that “different signals are needed”.The Ukrainian President argued that without a binding de-escalation agreement, relaxing sanctions simply empowered Moscow to “kill more” and “wage war for longer”.