Donald Trump and Volodymyr Zelensky are considering a deal that involves Washington buying battlefield-tested Ukrainian drones in exchange for Kyiv purchasing weapons from the US.The Ukrainian president said his latest talks with Mr Trump focused on a deal that would help each country bolster its aerial technology.

Russian weapons pounded four Ukrainian cities overnight from Tuesday to Wednesday, injuring at least 15 people in an attack that mostly targeted energy infrastructure, officials said.

But using heavy tariffs to stop countries buying Russian oil would be a blunt tool – and while they could significantly squeeze Russia’s war funding, they could also unleash more havoc on the rest of...