And the more I think about it, the less of an answer I have. This primarily affects farming states, which are in a really good position to pass laws that force manufacturers to either comply or leave the state. California has had good success doing this with other things (e.g. emissions standards), and farming is a niche enough category that JD can't afford to just ignore an entire state of farmland.
I don't live in such a state. I know some of the story, but it's not my problem and it's a bit presumptuous for me to step in and assume that I understand it well enough to solve it. Federal legislation usually does a bad job of solving the original problem anyways, after all of the sides are done negotiating over it. Far better for the farmers of Nebraska to directly appeal to their state legislators and get a bill that truly addresses the issue.