The revised U.S.-Ukraine economic deal will likely face large constraints in its near-term ability to help the United States diversify its critical minerals supplies, but it indicates a long-term U.S. interest in the security of Ukraine that could help support the White House's push for a ceasefire. On April 30, U.S. and Ukrainian representatives signed a deal to give the United States a large stake in the future development of Ukraine's natural resources, including critical minerals, and associated infrastructure projects. The deal is based on one provisionally reached in late February and centers on the creation of a joint investment fund into which each country would contribute half of the financing. Ukraine would make contributions from revenue accrued from royalties from future licences for minerals and oil and gas projects, while future U.S. military assistance would count towards its contributions. The fund would be jointly governed, with each country installing...