We have 68,500 farms in this state [1]. This summer was dry for a very long time, then it was very wet, and then it stayed very warm well into September. I suspect a lot of farmers had issues with moisture in their harvests. The thing about farming is you are taking a huge risk every year with what you invest, and farm equipment isn't cheap. If you make money, you make a decent amount of money. But if you can't make the payments on your machinery, you're basically done for.
I think this article was written with the intention of insinuating that this is somehow related to the Trump Trade war, and to be fair, I am sure that made or broke the profit margin for some farmers. But in general, I don't think that's what's going on here, and I think it's cheap journalism for them to play into that.
Somewhat related: Checkout "MN Millenial Farmer" on YouTube, it's some of the most relaxing content you'll find online. [2]
[1]: https://datcp.wi.gov/Pages/Publications/WIAgStatistics.aspx
[2]: https://www.youtube.com/channel/UCp0rRUsMDlJ1meYAQ6_37Dw