I think it’s part of the overall $40 Billion aid package for Ukraine.Lease loan?
Broken down into chunks for military hardware, economic support and food aid.
In total $8.5Billion has been set aside for military hardware transfer, of which the first chunk $1.4Billion is being assigned to long range precision guided delivery systems and weapons such as HIMARS.
It’s been said that the US is spending $100 million a day supporting Ukraine. I think the US is cool with this funding model as long as the Ukes keep killing Russians.