Ukrainian President Volodymyr Zelenskyy faced pressure on Friday (Feb 21) to sign a deal to hand the United States preferential access to Ukraine's mineral deposits following harsh criticism from US President Donald Trump.

Trump wants Ukraine to give US companies access as compensation for the tens of billions of dollars of aid delivered under his predecessor Joe Biden.

But Ukraine is seeking security guarantees from the United States in exchange for signing away precious rights to vast amounts of its natural resources and critical minerals.

Mike Waltz, Trump's national security adviser on Friday predicted that Zelensky would sign the deal soon.

"Look, here's the bottom line, President Zelenskyy is going to sign that deal, and you will see that in the very short term, and that is good for Ukraine," Waltz told a conference on the outskirts of Washington.

Trump's top advisers have doubled down on their attacks on Zelensky in recent days, after Trump branded him a "dictator" and falsely claimed Ukraine had "started" the war with Russia.

The war of words has stunned Kyiv and European capitals, a sign of just how rapidly Trump is overhauling Washington's long-standing support for Ukraine as he opens talks with Moscow on a settlement to the conflict.

Trump told a gathering of US governors at the White House he had "very good talks" with his Russian counterpart while adding that Ukrainian leaders "don't have any cards, but they play it tough".

The United States had been Ukraine's most important financial, military and political backer since Russia invaded in February 2022, in what the West's top powers had condemned as an unprovoked and illegal war of aggression.

A senior Ukrainian official earlier Friday told AFP that despite the tensions between Zelensky and Trump, talks on a possible agreement were "ongoing".

"There is a constant exchange of drafts, we sent another one yesterday," the Kyiv source said, adding that Ukraine was now waiting for a US response.

Kyiv had rejected a first attempt by Trump's team to strike a deal for Ukraine's natural resources, saying the proposal did not include security guarantees for Kyiv - a move that infuriated Trump.