The US is demanding guarantees from the EU that sanctions against Russia will be maintained in order to implement a loan mechanism that will provide Ukraine with a $50B loan secured by profits from frozen Russian assets.
Sanctions are renewed every six months and require the unanimous consent of all EU countries. Washington, however, wants the EU to extend the sanctions responsible for blocking Russia from access to its assets until the end of the war in Ukraine, ensuring that the US would not have to bear full responsibility for the loan. However, this decision will also require the unanimous consent of all EU leaders, including Hungary. The White House wants an agreement to be reached before the G7 summit in Italy next week.
Another option is for the EU and other G7 countries to provide bilateral loans to Ukraine secured by profits from the Russian assets held in their individual jurisdictions. This would require the EU to use funds from its common budget, which would also require the unanimous agreement of all EU countries.