Advancing Mutual Interests and Growing Our Success Act or the AMIGOS Act This bill makes Portuguese nationals eligible for E-1 and E-2 nonimmigrant visas if the government of Portugal provides similar nonimmigrant status to U.S. nationals. An E-1 visa is for individuals entering the United States to engage in international trade, while an E-2 visa is for individuals investing a substantial amount of capital in the United States. Both are limited to nationals from countries that have a treaty of commerce and navigation with the United States.