The United States has blundered into a trade war with Mexico, brought on entirely by Washingtons refusal to live up to an international agreement it previously has supported. Regrettably, my country is entirely in the wrong and Mexico is wholly in the right. As a patriotic American, I hate to say this–but its the simple truth.

Potato farmers all over the United States are collateral damage in this dispute–innocent victims in a clash of special interests.

The good news is that President Obama has a chance to end this destructive game of hot potato in about three weeks, when President Felipe Caldern of Mexico visits the White House. Ending this harmful trade war should rank near the top of Obamas agenda.

The controversy has deep roots. Under the terms of the North American Free Trade Agreement (NAFTA), the United States and Mexico were supposed to open their borders to each others trucks in 1995. Despite accepting this provision, our government never has kept its end of the bargain. It has refused to comply, essentially because Big Labors well-heeled bosses want special treatment. They dont want to face the kind of competition that American workers in many other industries must confront every day.

The promise-breaking protectionists have claimed that Mexican trucks arent safe enough for American roads. Nobody wants dangerous trucks driving on U.S. highways, of course. Yet this provocative claim is a sideshow–a diversion meant to stir up anxieties rather than address the central question of treaty obligations. In fact, independent studies have shown that Mexican carriers that participated in a Department of Transportation test program actually had better safety records than their American counterparts.

Washingtons attempt to get out of its NAFTA commitment is disgraceful. This was obvious from the start, but it became even clearer when an international dispute resolution panel, which included American membership, ruled unanimously in favor of Mexicos complaint.

For more than a decade, Mexico tried to work out a compromise with Washington. It waited patiently, listening to new promises and hoping for a reasonable solution. Last year, however, it finally tired of the delays and excuses. It retaliated, imposing $2.4 billion in new tariffs on a wide range of American-made products.

Potato farms in the northwest have taken a direct hit, due to a 20-percent tariff hike on frozen-potato products. Sales to Mexico have fallen drastically. Because of this, potato prices have fallen. Were putting fewer potatoes in the ground and making across-the-board cuts to our farming operations. Farmers arent the only people affected. Potato-processing plants in our area are laying-off workers. The poor economic climate accounts for some of this downturn, but not all of it.

Washingtons refusal to abide by its treaty obligations has taken a bad situation and made it worse. Farmers are losing income and workers are losing jobs because public officials want to appease a special interest.

The big winner in all of this is Canada. Its sales in frozen-potato products have increased almost exactly as much as ours have diminished. Weve surrendered market share–and the jobs that come with it–to a foreign competitor.

With Calderns visit to Washington on May 19, Obama ought to announce an end to the trade war. It would certainly serve his political interests. He came into office on a pledge to improve Americas image in the world. And earlier this year, in his State of the Union address, he committed his administration to doubling U.S. exports in the next five years.

He should now compel Washington to live up to its diplomatic commitments and create the opportunity for American farmers and manufacturers to sell more of what they grow and make to customers in Mexico.

Promises such as these are worth keeping.

Cheryl Koompin is a partner in Koompin Farms, producing commercial and seed potatoes, feed corn, fresh peas, wheat, medicinal safflower and mustard in Power County, Idaho. Cheryl is a guest author for Truth About Trade & Technology.