I farm outside of the US, so maybe I have misunderstood something, but did the 2014 farm bill not eliminate those subsidies that people used to talk about with respect to corn? As I understand it, since 2014, the system was brought in line with the system we use in my country. There is crop insurance available to corn farmers, where the government pays a portion (65%, if I recall correctly?) of the cost, but that is not limited to corn and not really an incentive to grow corn in particular. I would not be at all surprised if corn takes the largest share of claims simply due to how much of it is grown.