The U.S. expects substantial progress in talks with Ukraine this week and hopes that a deal on critical minerals can be signed, President Donald Trump's Middle East envoy Steve Witkoff said on Monday.

On the benefits side, the gains may not be that great. There are a lot of unknowns about Ukrainian minerals. The U.N. says Ukraine holds 5% of the world’s rare earth minerals, including 22 of the 34 most critical for national security. But assessments of Ukrainian minerals are based on outdated Soviet-era data and models that may not be accurate.

After a heated meeting in the White House, both sides have signaled that they are still open to reaching an agreement.

Trump has told his advisers that he wants to announce the agreement in his address to Congress tonight, sources say, cautioning that the deal had yet to be signed and the situation could change.

European officials have been told that President Donald Trump wants to link the proposed US-Ukraine minerals deal to demands for Kyiv to commit to a quick ceasefire with Russia, according to people familiar with the matter.

NBC News Senior National Security Correspondent Courtney Kube reports that President Trump wants to see more than a rare earth minerals deal to resume military aid and intelligence sharing with Ukraine,