I’m a dairy, beef and grain farmer with our sons actively managing and buying ownership in our three generation operation. My passion is, and has always been, about the dairy cows and producing milk — ”nature’s perfect food.”   

That is why I’m so concerned about President Trump’s growing threats to end the North American Free Trade Agreement (NAFTA), which may send tingles of joy up the spines of the minority of Americans who believe Mexico is getting the best of the United States but it would certainly send shock waves through the Iowa economy.

Interestingly, while 56 percent of Americans say NAFTA has been good for our country compared to 33 percent who think it has been bad, Republican sentiment is almost exactly opposite (35 to 54 percent), according to a...