The current trade war between China and the US is hurting American farmers. Commodities such as such as soybeans are the most significant. In 2017 the US exported $23.8 billion in farm products to China.
The issue of farm income will be very important in the 2020 Presidential election. Most of the farming states went for Donald Trump in the last election in 2016. If they are losing money, they will not do so again in 2020.