A copy of the agreement obtained by The New York Times says that the United States “supports Ukraine’s effort to obtain security guarantees needed to establish lasting peace.”

But Ukraine appears to have steered away from America’s first brazen, extractive demands into something that is closer to a joint investment venture. The deal looks to be a good way short of the $500bn “payback” that Mr Trump had demanded from Ukraine,

The BBC's Analysis Editor Ros Atkins takes a look at what we know - and what we don't - about the US-Ukraine mineral deal.