Three years into the war with Russia, President Zelensky appears to have become embroiled in a personal feud with the leader of Ukraine’s most powerful ally.

"It's unacceptable, they [Ukraine] need to tone it down and take a hard look and sign that deal," he tells Fox News. The deal he is referring to is a push by Donald Trump for access to rare minerals in Ukraine in return for aid, or even as compensation for the support the US has already provided.