T he North American Free Trade Agreement (NAFTA) entered into force on January 1, 1994, establishing a free trade area as part of a comprehensive economic and trade agreement among the United States, Canada, and Mexico. Currently, the United States is renegotiating the agreement. However, repeated threats from President Trump to abandon NAFTA and other actions by the Administration as part of ongoing efforts to "modernize" NAFTA have raised concerns that the United States could withdraw from the agreement altogether. Although some U.S. agricultural industries support NAFTA renegotiation and efforts to address certain outstanding trade disputes--especially regarding milk, potatoes, some fruits and vegetables, cheese, and wine--many continue to express strong support for NAFTA and oppose outright withdrawal. Possible disruptions in U.S. export markets and general uncertainty in U.S. trade policy also continue to be a concern for U.S. food and agricultural producers. Similar concerns have been raised by some in Congress who have oversight authority on industry and trade activities and who continue to monitor the ongoing NAFTA renegotiations. This report examines some of the potential consequences to U.S. agricultural markets of a U.S. withdrawal from NAFTA, focusing on the possibility that higher tariffs could be imposed on U.S. imports and exports. In particular, under a NAFTA withdrawal, it is likely that most-favored-nation (MFN) tariffs would be imposed on agricultural products traded among the NAFTA countries instead of the current zero tariff (i.e., duty-free trade) for most agricultural products. In general , MFN tariffs on U.S. agricultural imports would likely raise prices both to U.S. consumers and other end users, such as manufacturers of value-added food products. Applying general principles of supply and demand, it is possible to anticipate the effect that sustained higher prices due to higher MFN tariffs could have on the volume (quantity) of goods traded. Specifically, as prices increase, the quantity demanded for a product tends to decrease. Assuming MFN tariffs could apply in the event of a U.S. NAFTA withdrawal, imported products could become more expensive, which could lower the demand for some U.S. agricultural imports. Similarly, if higher MFN tariffs were applied to U.S. goods exported to Canada and Mexico, this could make some U.S. agricultural products more costly to buyers in those markets, which could lower U.S. exports--such as meat products, grains and feed, and processed foods. As part of a formal free trade agreement (FTA) negotiation, the Office of the United States Trade Representative (USTR) will often request a "probable economic effects" study of a trade agreement, which is usually conducted by the United States International Trade Commission (USITC). The Administration has asked USITC to conduct only an investigation into the probable economic effect of eliminating tariffs on certain dutiable NAFTA imports currently under a tariff rate quota (TRQ). This analysis was expected to have been completed in August 2017 but is confidential and not publicly available. USTR has confirmed that, to date, a comprehensive review of a possible U.S. withdrawal from NAFTA has not yet been conducted. Comprehensive analysis of a possible U.S. NAFTA withdrawal focused exclusively on agricultural markets is also not available. Researchers at the U.S. Department of Agriculture (USDA) have not yet conducted such an analysis. University researchers often also contribute to studies of the effects of a range of market and trade policy actions. CRS communications with researchers that typically conduct such studies indicate that an assessment of a possible U.S. NAFTA withdrawal on agricultural markets has not been initiated at this time. An extensive amount of data would be needed to conduct such an analysis, including quantity produced and traded for a wide range of products, domestic and international prices, production costs and inputs, measures of price response by product and market, and other modeling data. The text box below provides a qualitative summary of some of the potential ways that U.S. agricultural markets could be affected if the United States were to withdraw from NAFTA. A recent economy-wide study by a private research firm, ImpactECON, concluded that a "NAFTA reversal" would likely raise U.S. tariffs on Canada and Mexico imported products to current MFN rates, which could cause all NAFTA parties to experience declines in real gross domestic product (GDP), trade, investment, and employment. The study examined trade and economic changes assuming both reciprocation and no reciprocation in terms of Canada's and Mexico's applied tariffs. According to the study, if Canada and Mexico were to also impose higher MFN tariffs, this could result in additional overall trade declines among the NAFTA countries, resulting in the loss of 256,000 low-wage workers in the short term (three to five years) as well as additional relocation of workers throughout the United States. The ImpactECON study concluded that a NAFTA reversal could especially impact the meat, food, textiles, auto, and services sectors. Impacts are likely to be greatest for those industries where production is highly integrated. The ImpactECON study and its conclusions regarding the potential impacts to the food and agricultural sectors have been highly commended and cited by some agricultural economists. For example, Dermot Hayes of Iowa State University notes that imposing MFN duties will have a price effect on traded goods that will lead to eventual market adjustment, forcing the United States to seek alternative export markets or be forced to downsize the domestic industry. For example, he estimates that MFN duties of 20% on U.S. pork exports to Mexico could cause a 5% contraction of the U.S. pork sector and stimulate additional production in Mexico and/or require Mexican buyers to find additional suppliers outside the United States. Contraction in the U.S. pork industry would result in a loss of U.S. jobs and have a disproportionate effect on specific counties that are dependent on farming, input markets, and value-added production in the sector. Trade under NAFTA underpins an important market for U.S. food and agricultural producers. Canada and Mexico are the United States' two largest trading partners, accounting for 28% of the total value of U.S. agricultural exports and 39% of its imports in 2016. Over the past 25 years under NAFTA, the value of U.S. agricultural trade with Canada and Mexico has increased sharply. Exports rose from $8.7 billion in 1992 to $38.1 billion in 2016 ( Figure 1 ), while imports rose from $6.5 billion to $44.5 billion over the same period ( Figure 2 ). Adjusted for inflation, the value of agricultural exports and imports between the United States and its NAFTA partners has increased roughly threefold since 1990, growing at an average rate of about 5%-6% annually. This growth resulted in a $6.4 billion trade deficit for U.S. agricultural products in 2016, reversing the trend in previous years when there was a trade surplus. In 2016, U.S. agricultural exports to Canada were valued at $20.2 billion. The leading exports were grains and feed, animal products, fruits and vegetables and related products, nuts and other horticultural products, sweeteners, oilseeds, beverages (excluding fruit juice), and essential oils. U.S. agricultural exports to Mexico were valued at $17.8 billion in 2016. The leading exports were animal products, grains and feed, oilseeds, sweeteners, fruits and vegetables and related products, nuts and other horticultural products, cotton, seeds, and nursery crops. Mexico is also the largest or second-largest market for U.S. beef, pork, poultry, dairy, wheat, and corn exports. For more information about U.S. agricultural trade under NAFTA, see CRS Report R44875, The North American Free Trade Agreement (NAFTA) and U.S. Agriculture , and CRS In Focus IF10682, NAFTA Renegotiation: Issues for U.S. Agriculture . Under NAFTA, tariffs and quantitative restrictions were eliminated on most agricultural products, with the exception of some that may be subject to TRQs and high out-of-quota tariff rates. Under NAFTA, Canada excludes dairy, poultry, and eggs for tariff elimination. The United States excludes dairy, sugar, cotton, tobacco, peanuts, and peanut butter. Because Canada was able to exclude certain products from tariff elimination in NAFTA, Canada is able to limit imports through restrictive TRQs. For example, according to USTR, imports of U.S. products above quota levels may be subject to out-of-quota tariffs as high as 245% for cheese and 298% for butter under NAFTA. Aside from these exempted products, most agricultural products are traded duty-free (i.e., zero tariff) and receive other types of trade preferences intended to facilitate trade. Under an FTA, preferential tariffs are charged to member countries and are lower than a country's MFN tariff rates. MFN rates generally reflect the highest (most restrictive) rates that World Trade Organization (WTO) members can charge each other on imported goods and services. The text box below describes the different types of tariffs. Trade data presented here are by selected agricultural commodity groupings, as defined by USDA. In some cases, trade data are grouped according to tariff chapters under the Harmonized Commodity Description and Coding System (HS). The HS refers to a hierarchical structure for describing all goods in trade for duty, quota, and statistical purposes. The primary two-digit HS product categories are further subdivided into four-digit HS product categories. The first 24 chapters of most tariff schedules worldwide cover most agricultural and fisheries products. Product groupings by HS chapter exclude some agricultural commodities including cotton, essential oils, starches, hides, and skins. MFN tariffs presented here for all NAFTA countries were compiled by CRS from WTO's database and summarize available country tariff information at the HS-2 and HS-4 levels. WTO's tariff database includes MFN tariffs for products at the HS-2, HS-4, and HS-6 levels for all traded goods for most countries. This database documents both ad valorem (AV) tariffs--or the rate charged as a percentage of the price--and non-AV tariffs, such as specific tariffs. WTO's database does not extend beyond the HS-6 level. Average MFN tariffs reported by the WTO include tariffs expressed as AV. Tariffs expressed in terms of AV facilitate a comparison across different countries and are also useful for interpreting potential economic effects. For example, in general, a 10% tariff on a traded product roughly translates into a 10% price increase for that product, often paid for by the buyer of that product. However, average MFN tariff rates reported by the WTO do not include non-AV tariffs, such as specific tariffs or tariffs charged as a fixed amount per unit of quantity (e.g., $7 per 100 kg). It is important to note that the WTO tariff database does not translate non-AV tariffs to an ad valorem equivalent (AVE) basis. Accordingly, non-AV tariffs are not included as part of the WTO database's calculation of average AV tariff rates. This may exclude tariffs for certain agricultural products under a TRQ or where seasonal tariffs might apply (e.g., higher import tariffs for certain fruits and vegetables imported during U.S. peak season). Tariffs for agricultural products under a TRQ or where seasonal tariffs apply are often expressed as specific tariffs and/or at the HS-6 level or higher (HS-8 or HS-10 level) and are excluded from most reported average tariff rates. For reasons described in the text box below, WTO-reported average AV tariffs may therefore provide an incomplete picture of MFN duties for certain types of agricultural products. Despite these data limitations, tariff data provided in this report cover the WTO-reported average AV duties for each of the NAFTA partner countries at the HS-4 level only. As this provides for a subset of all MFN tariffs for agricultural products--excluding non-AV rates for some products--it provides an incomplete picture of actual tariff rates for some agricultural imports. Since average AV tariffs for agricultural products may be lower than actual applied rates, tariff rates discussed in this report likely understate actual applied rates for some agricultural imports. Accordingly, MFN rates described in this report are intended to provide an initial glimpse of the types of potential impacts in the event of a possible U.S. NAFTA withdrawal. Figure 3 summarizes the agricultural and fisheries tariffs by country for each of the 24 HS chapters at the HS-2 level. Figure 3 shows the minimum and maximum AV MFN tariffs (gray bar) and the average AV MFN tariff (red marker) for selected products (expressed at the HS-2 level) for the United States, Canada, and Mexico. Appendix A provides more detailed tariff information at the HS-2 level for each of the three NAFTA countries. Appendix B summarizes nearly 200 categories of agricultural and fisheries tariffs at the HS 4- level for each of the three countries. Additional analysis is needed to fully capture the full extent of the potential market impacts of possibly higher MFN tariffs rates, especially for products under a TRQ or seasonal tariff. Ideally, such an analysis would be conducted in conjunction with economic modeling to simulate potential changes of higher tariffs on the quantity of products traded among the NAFTA countries under different scenarios. Such an analysis would also need to fully account for all other non-AV tariff rates that have not been converted to AVE. Calculating AVE rates for each of the roughly 2,700 individual tariff lines at the HS-6 level for each of the NAFTA partner countries is beyond the scope of this analysis due to time and resource constraints. Complete tariff information is further not readily available to calculate AVE tariffs for each of the individual tariff lines for products at the HS-8 and HS-10 levels for each country. Following is a discussion of possible tariff changes to both U.S. agricultural imports and exports in the event of a possible U.S. NAFTA withdrawal. With few exceptions, under NAFTA, agricultural products are imported duty-free (zero tariff), and U.S. agricultural products also generally face zero tariffs when exported to Canada and Mexico. In lieu of preferential trade policies under NAFTA, tariffs charged on U.S. imports and exports could revert to generally higher MFN tariffs. Other types of trade effects are not examined, such as the effects of trade on the possible removal of other types of NAFTA-related trade preferences (e.g., policies regarding SPS measures, customs charges, permits, quotas, trade regulations, import licenses, and border restrictions). Figure 3 shows MFN tariffs on U.S. agricultural imports. As shown, while the minimum MFN tariff on U.S. imports can be zero for many agricultural products, the maximum AV tariff varies widely and can be prohibitively high for some products, such as tobacco, oilseeds, and some processed fruit and vegetable products. As noted previously, in general, higher MFN tariffs on U.S. agricultural imports would likely raise prices both to U.S. consumers and other end users, such as manufacturers of value-added food products. Accordingly, if higher MFN tariffs apply, some U.S. imports could become more costly to U.S. end users. For example, the maximum MFN tariff is 29.8% for certain tropical fruit imports, which could raise the cost of some products to U.S. consumers ( Appendix B , see HS 0804). Applying MFN tariff rates could also raise the cost to food processors who import cereal flours for use in further value-added food production. The maximum MFN tariff is 12.8% on cereal flour imports to the United States ( Appendix B , see HS 1102). Alternatively, some U.S. imports that currently compete with U.S.-produced products might experience a reduction in trade as imported products drop in response to higher U.S. tariffs. This could create a competitive advantage for U.S. producers as potential domestic suppliers. For example, tariffs for U.S. melon and watermelon imports carry a relatively high maximum MFN tariff of 29.8% ( Appendix B , see HS 0807), suggesting that imports could slow given higher prices due to possible prohibitive tariff rates, thus giving U.S. producers a competitive advantage. However, not all imported products would face higher tariffs if MFN tariffs were imposed. Some produce imported from Mexico that has been of concern to U.S. producers --such as tomatoes (HS 0702) and berries (HS 0810)--carries a zero to low MFN tariff ( Appendix B ). In this case, a possible NAFTA withdrawal might not slow imports from Canada and Mexico on the basis of price changes based on changes in import tariffs. Figure 3 shows MFN tariffs on Canadian and Mexican agricultural imports that could be charged on U.S. products if these countries were to reciprocate and charge MFN tariffs in the event of a possible NAFTA withdrawal. Similar to in the United States, while the minimum MFN tariff on imports to these countries can be zero or low for many agricultural products, the maximum AV tariff varies widely and can be prohibitively high for some products. For example, in Canada, the maximum AV tariff is 27% for some meat products and 95% for some imported grains. In Mexico, the maximum AV tariff is 75% for some meat products and 20% for some imported grains. Again, the maximum AV tariff varies widely depending on the product ( Figure 3 ). As noted previously, in general, the imposition of higher MFN tariffs on U.S. agricultural exports would likely make U.S. products in those markets less price-competitive and more costly to foreign buyers, which could result in reduced quantities sold. Accordingly, if higher MFN tariffs apply, some U.S. products could become more costly to Canadian and Mexican end users. For example, Mexico's maximum MFN tariffs on its corn (maize) imports can be as high as 20% ( Appendix B , see HS 1005). This suggests that certain U.S. corn exports to Mexico could become up to 20% more expensive for buyers in that market. This could give other global corn suppliers an opportunity to gain additional import share in Mexico. Similarly, the maximum MFN tariff for pork meat imports to Mexico could raise tariffs on some pork products from current duty-free levels under NAFTA to a maximum MFN tariff of 20% ( Appendix B , see HS 0203). This could give an advantage to other global suppliers. MFN tariffs on U.S. corn and pork meat imports would remain duty-free (i.e., zero tariff). As higher MFN tariffs in Canada and Mexico could make U.S. agricultural products relatively more costly compared to other competing global suppliers, this could impact U.S. market share for some agricultural products in these two markets. Figure 4 and Figure 5 illustrate the importance of Canada and Mexico to U.S. agricultural trade for selected agricultural commodity groupings, as defined by USDA. Figure 6 and Figure 7 illustrate the importance of products from the United States to Canada's and Mexico's agricultural markets. Figure 4 shows selected U.S. agricultural exports to Canada and Mexico compared to exports to all other non-NAFTA countries in 2016. While Canada and Mexico accounted for 28% of the value of total U.S. agricultural exports, NAFTA countries accounted for a larger share of some U.S. exports--for example, 62% of U.S. sugar and tropical products and 51% of fresh and processed vegetables. Figure 5 shows selected U.S. agricultural imports from Canada and Mexico compared to imports from all other non-NAFTA countries in 2016. As shown, while Canada and Mexico accounted for 39% of total U.S. agricultural imports, NAFTA country suppliers account for a larger share of total imports for some commodities--for example, 58% of U.S. grains and feeds and 70% of fresh and processed vegetables. Figure 6 shows the U.S. market share of Canada's agricultural imports as a share of the value of total imports from all countries. In 2016, U.S. agricultural products accounted for 59% of the value of all Canadian agricultural imports. Some U.S. products, such as grains/feed and meat products, account for a larger share of total imports (more than 70%, on average). Figure 7 shows the U.S. market share of Mexico's agricultural imports in 2016 as a share of total imports from all countries. In 2016, U.S. agricultural products account for 72% of the value of all of Mexico's agricultural imports. Some U.S. product categories, however, account for an even greater share of total imports, such as grains and feed, meat products, sugar and related products, and processed foods, which accounted for more than 80% of the total value of Mexico's imports in 2016. These market share data highlight those U.S. agricultural products that may be considered more heavily reliant on NAFTA trade, suggesting the importance of the agreement to U.S. sales of grains and feed, oilseeds, meat and dairy products, processed foods, fresh and processed fruits and vegetables, tree nuts, and sugar products. These market share data--together with MFN tariff information--further suggest that these products may become more costly and less competitive in these markets as higher tariffs, mostly duty-free access, and other types of trade preferences are removed under a possible U.S. NAFTA withdrawal. When President Trump announced in April 2017 that he was considering withdrawing the United States from NAFTA, many U.S. agricultural groups expressed strong opposition to withdrawal. Many in Congress also voiced opposition to outright withdrawal from NAFTA. The National Pork Producers Council stated that NAFTA withdrawal could be "cataclysmic" and "financially devastating" to U.S. pork producers. The National Corn Growers Association said that "withdrawing from NAFTA would be disastrous for American agriculture" and would disrupt trade with the sector's top trading partners. The American Soybean Association said withdrawing from NAFTA is a "terrible idea" and would hamper ongoing recovery in the sector. The U.S. Grains Council highlighted that withdrawal would have an "immediate effect on sales to Mexico." The National Association of Wheat Growers (NAWG) noted that Mexico is the largest U.S. wheat buyer and claimed that NAFTA withdrawal would be a "terrible blow to the U.S. wheat industry and its Mexican customers." Cargill, Inc., a major privately held U.S. grain distributor and global agricultural supplier, claims that sales to Canada and Mexico account for an estimated 10% of the company's annual revenues. Most fruit and vegetable growers did not support NAFTA withdrawal, citing the benefit of exports to Mexico. The Administration did not withdraw from NAFTA at that time, deciding instead to formally renegotiate and "modernize" NAFTA. Although many in Congress and in the U.S. agricultural sectors support NAFTA renegotiation and efforts to address certain outstanding trade disputes--such as disputes involving milk, potatoes, some fruits and vegetables, cheese, and wine--most U.S. agricultural groups are unified in their opposition to outright NAFTA withdrawal. An October 2017 letter from nearly 90 farm and agriculture groups states that "NAFTA withdrawal would cause immediate, substantial harm to American food and agriculture industries and to the U.S. economy as a whole." Agriculture groups also remain concerned about growing uncertainty in U.S. trade policy and its potential to disrupt U.S. export markets. Some also worry that the Administration is actively seeking to exit NAFTA. Among the concerns of U.S. agricultural groups related to a withdrawal is fear that the nation's NAFTA trading partners could seek alternative markets for U.S. corn, soybean, dairy, pork, beef, and rice. For example, media reports indicate that Mexico is looking to find alternative suppliers for some imported products, such as rice (which could be supplied by Vietnam and Thailand), corn and soybeans (Argentina and Brazil), wheat (Argentina and the Baltic States), and dairy products (New Zealand and Europe). The U.S. pork industry continues to claim that a NAFTA withdrawal would be catastrophic to the sector. Meanwhile, reports also indicate that Mexico is not worried about finding alternative consumer markets for some of its exported products, such as avocados, which are now mostly sold to the United States. Other reports suggest that Mexico's efforts to diversify its agricultural suppliers and markets may be in retaliation for certain U.S. proposals tabled during the NAFTA renegotiation. Others suggest that the general tone of the ongoing renegotiation has had a negative impact on the relations among the NAFTA partners. An economy-wide survey of investors by the industry-supported Trade Leadership Coalition reports that 72% of agricultural investors surveyed believe that the near-term (one to two years) business impacts of ending NAFTA would be negative (56% of businesses surveyed) or very negative (16%). Also, 78% of agricultural investors surveyed believe that the risks of NAFTA withdrawal have not been fully priced into stock valuations. Members of the International Chamber of Commerce have also warned that U.S. withdrawal from NAFTA or other critical changes to the agreement would "greatly restrict, rather than enhance, cross-border commerce." The Trump Administration has generally downplayed these types of concerns. However, USDA is reportedly developing a contingency plan to protect against potential agricultural losses if the United States withdraws from NAFTA. Again, in August 2017, President Trump and other Administration officials suggested the United States would likely withdraw from the agreement. Most states continue to express their support for NAFTA. The National Association of State Departments of Agriculture and the American Farm Bureau Federation, among other industry coalition groups, also continue to emphasize the importance of NAFTA to the U.S. agricultural sectors and the need to maintain a preferential trade relationship with Canada and Mexico. Many in Congress representing states with agricultural interests continue to express opposition to NAFTA withdrawal. In November 2017, the leadership of the House Agriculture Committee, Chairman K. Michael Conaway and Ranking Member Collin C. Peterson, joined several U.S. agriculture groups in opposing withdrawal and supporting a quick end to the ongoing NAFTA renegotiations. In October, 2017 Chairman Pat Roberts of the Senate Agriculture Committee expressed support for NAFTA and emphasized the need for industry leaders to present their support to the Administration. Senator Debbie Stabenow, Ranking Member of the Senate Agriculture Committee, has also expressed support for NAFTA. Reportedly, some agricultural groups believe that Congress has the ability to intervene, if President Trump withdraws the United States from NAFTA. Congress maintains oversight authority on industry and trade activities and has continued to monitor and conduct hearings on the ongoing NAFTA renegotiations. For additional information on the role of Congress in the ongoing negotiation, see CRS Report R44981, NAFTA Renegotiation and Modernization . For additional information on the legal aspects of congressional action in this area, see CRS Legal Sidebar WSLG1724, Renegotiation of the North American Free Trade Agreement (NAFTA): What Actions Do Not Require Congressional Approval? Appendix A. Most-Favored-Nation (MFN) Tariff, HS-2, Agricultural and Fisheries Products (United States, Canada, Mexico) Appendix B. Most-Favored-Nation (MFN) Tariff, HS-4, Agricultural and Fisheries Products (United States, Canada, Mexico)

Summary:
The North American Free Trade Agreement (NAFTA) entered into force on January 1, 1994, establishing a free trade area as part of a comprehensive economic and trade agreement among the United States, Canada, and Mexico. Currently, the United States is renegotiating the agreement. However, repeated threats by President Trump to abandon NAFTA and other actions by the Administration as part of ongoing efforts to "modernize" NAFTA have raised concerns that the United States could withdraw from NAFTA. Although some U.S. agricultural sectors support NAFTA renegotiation and efforts to address certain outstanding trade disputes--regarding milk and dairy products, potatoes, some fruits and vegetables, and wine--many continue to express strong support for NAFTA and oppose outright withdrawal. Possible disruptions in U.S. export markets and general uncertainty in U.S. trade policy also continue to be a concern for U.S. food and agricultural producers. Similar concerns have been raised by some in Congress who have oversight authority on industry and trade activities and who continue to monitor and conduct hearings on the ongoing NAFTA renegotiations. Trade under NAFTA provides an important market for U.S. agricultural producers and a broader choice of food products for U.S. food processors and consumers. Canada and Mexico are the two largest U.S. agricultural trading partners (combining imports and exports), accounting for 28% of the total value of U.S. agricultural exports and 39% of U.S. imports in 2016. Under NAFTA, U.S. agricultural trade with Canada and Mexico has increased significantly. Agricultural exports rose from $8.7 billion in 1992 to $38.1 billion in 2016, while imports rose from $6.5 billion to $44.5 billion over the same period. Adjusted for inflation, growth in the value of total U.S. agricultural exports and imports with its NAFTA partners has increased roughly threefold, growing at an average rate of 5%-6% annually. To date, comprehensive quantitative analysis of a possible U.S. NAFTA withdrawal focused exclusively on agricultural markets is not yet available. This report looks at the potential economic effects to agricultural markets of a possible U.S. NAFTA withdrawal assuming the application of most-favored-nation (MFN) tariffs on traded agricultural products instead of the current zero tariff (i.e., duty-free trade) for selected agricultural products. MFN rates generally reflect the highest (most restrictive) rates that World Trade Organization (WTO) members can charge each other on imported goods and services. In general, the application of MFN tariffs on U.S. agricultural imports would likely raise prices both to U.S. consumers and other end users, such as manufacturers of value-added food products. MFN tariffs on U.S. agricultural exports would, in turn, likely make U.S. products in those markets less price-competitive and more costly to foreign buyers, which could result in reduced quantities sold. Given that certain agricultural products dominate U.S. trade with Canada and Mexico--such as meat products, grains and feed, and processed foods--these products could become more costly and less competitive as MFN tariffs are imposed and other trade preferences are removed under a NAFTA withdrawal. This could result in reduced market share for U.S. products in these markets. This report looks at a subset of MFN tariffs for certain products that could impact U.S. agricultural markets in the event of a possible U.S. NAFTA withdrawal. Other potential trade impacts under a U.S. withdrawal from NAFTA could include (but are not limited to) higher prices for imported products from Canada and Mexico, reductions in agricultural imports that compete with U.S. products, disruption of integrated supply chains, general market disruption and uncertainty, economic impacts to some agricultural-producing states (both positive and negative), and a decrease of future negotiating leverage of the United States (e.g., to review and resolve disputes regarding a range of non-tariff barriers to trade).