Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Washington (CNN) Bob Hemseath, whose corn-farming business hinges on the whims of mother nature, is comfortable with uncertainty. But as the fourth-generation farmer heads onto his northeast Iowa farm for the 2017 planting season, it's the uncertainty coming from the White House that has Hemseath increasingly worried. The farmer listened during the 2016 campaign as Donald Trump, the real estate magnate turned politician, promised to end the North American Free Trade Agreement. Hemseath, a Republican whose industry relies heavily on exports to Mexico, chalked it up to political bluster, noted Hillary Clinton's anti-trade rhetoric and voted for Trump in November.Trump has said he wants to renegotiate NAFTAHe recently spoke with the leaders of Canada and Mexico 
 Question:"We are trying very diligently to make sure he understands the agriculture portion of _ is really quite good."

North American Free Trade Agreement