President Donald Trump is dealing simultaneously with Congress on illegals within the United States and with Mexico (and also Canada) on trade in the negotiations over the North American Free Trade Agreement (NAFTA). Why not wrap the two issues of illegals (mostly from Mexico) and trade with Mexico into one deal?

Trump opposes multilateral trade deals, notably NAFTA, and prefers two-party or bilateral trade deals. He rightly believes the U.S. loses negotiating power in multilateral agreements.