A look at two politically-sensitive products under NAFTA.The second round of NAFTA negotiations finished last week, which could have been called the “ham and tomato” round from the bilateral U.S.-Mexico perspective. The two countries’ negotiators sunk into a direct tit-for-tat argument during the ag talks over two commodities each side considers a politically-sensitive product: Mexican tomatoes and U.S. primal hams.One of the trade negotiating objectives listed by the U.S. Trade Representative in mid-July was to lower the threshold for establishing antidumping and countervailing duty cases on perishable and seasonal products such as Florida tomatoes. Imports of Mexican tomatoes into the U.S. grew from 1.2 billion pounds in 2000 to 3.2 billi...