One piece of legislation has had as profound an impact on America as thousands of other bills combined, yet very few people are familiar with it.

I’m referring to the farm bill, which ensures a safe and abundant food supply, helps feed the hungry, invigorates rural communities and helps farmers take care of the environment.

As I travel the country, it’s clear the farm bill has had a broad, visible impact: Family farms able to be passed to the next generation because of the USDA’s numerous risk management tools and programs. Families able to put dinner on the table thanks to nutrition assistance programs. Soil and water improvements because of land ...