USAID isn't purely foreign aid. It's also a crop price support program!
When US farmers overproduce crops (which we often do), the gov't buys up the extra & exports it as aid.
That's USAID.
Without USAID, we get gluts. WAY too much corn, soy, etc. Prices crash. Makes farmers sad and/or broke.
Now check out what crop prices have been doing the last 3 years
and tell me how you think the farm lobby is gonna feel about losing the "buy up gluts to prevent price crashes" program lmao