The US under secretary of state for foreign assistance, humanitarian affairs and religious freedom, Jeremy Lewi, and the UN under secretary general for humanitarian affairs, Tom Fletcher, in Geneva on 29 December. abrice Coffrini/AFP/Getty ImagesThe US under secretary of state for foreign assistance, humanitarian affairs and religious freedom, Jeremy Lewi, and the UN under secretary general for humanitarian affairs, Tom Fletcher, in Geneva on 29 December. abrice Coffrini/AFP/Getty ImagesUS pledges $2bn in new UN model for delivery of humanitarian assistanceGaza not covered in announcement and will be handled on separate track, says US state department officialThe United States on Monday pledged $2bn in assistance to tens of millions of people facing hunger and disease in more than a dozen countries next year, part of what it said was a new mechanism for the delivery of life-saving assistance following major foreign aid cuts by the Trump administration. The US slashed its aid spending this year, and leading western donors such as Germany also pared back assistance as they pivoted to increased defense spending, triggering a severe funding crunch for the UN.