Apparently the US administration is pretty greedy and also doesn't want to give security guarantees. It doesn't look too good: https://www.politico.eu/article/us-donald-trump-asks-zelenskyy-half-ukraine-rare-minerals-military-support/

Ukraine is not going to want to sign a deal that doesn't include the europeans in some way. Trust that the US's word is good is not high. And so far it's looking like the european states want a deal which puts Ukraine on a path to NATO membership. Difficult to see how this plays out.

It's in the interest of the russians to put the demand of Ukraine not joining NATO at the highest priority, so they can attack them again in a few years time. It's likely that the Russians will interpret any 'security deal' Trump signs with Ukraine to be worthless.

@MalachiteEagle the great thing about a rare earths for military deal is that it doesn't need trust. If the military doesn't arrive then you don't give up the rare earths.

@MartinRandall not if the security deal doesn’t include a peacekeeping force

@MalachiteEagle then the Russians take the rare earths and the US doesn't get them.

The official added that the U.S. scheme “might not work” as it could fall afoul of  Ukrainian law.