In the US it's controversial in the sense that there's 40% of the stakeholders that want to stop, and 60% that wouldn't dream of it. Just "controversial" makes it sound like there's wide-ranging debate. As far as I know the rest of the West is still onboard too, and they're not a negligible source of aid, just somewhat smaller than the US.

It would be a big blow to lose the US, though, you're right about that.