Farmers showed up at the polls for Trump. Now they want him to do the same for them on NAFTA.Using the hashtag #Farmers4NAFTA, individual farmers and agricultural groups are tweeting about the benefits of Nafta.Canada received $20.3 billion worth of American agricultural products in 2016, making it the top destination for such goods, according to the U.S. Department of Agriculture. Mexico received $17.7 billion, coming in third place behind China. The tweets add to the voices in Congress calling on the administration to remain in Nafta. Senator Pat Roberts, a Kansas Republican, published an Op-Ed in The Hillon Wednesday highlighting the benefits of the agreement. Republican Senators Deb Fischer of Nebraska and Joni Ernst of Iowa also made a case for the agreement on Tuesday over lunch with the president and the U.S. Trade Representative Robert Lighthizer.