After the War of Independence, the relations of Mexico were focused primarily on the United States, its northern neighbor, largest trading partner, and the most powerful actor in hemispheric and world affairs. Mexico supported the Cuban government since its establishment in the early 1960s, the Sandinista revolution in Nicaragua during the late 1970s, and leftist revolutionary groups in El Salvador during the 1980s. Felipe Calderón's administration (2006–2012) put a greater emphasis on relations with Latin America and the Caribbean. Enrique Peña Nieto (2012–2018) emphasized economic issues and foreign investment, particularly the now-defunct Trans-Pacific Partnership. Andrés Manuel López Obrador has taken a cautious approach, unwilling to challenge U.S. President Donald Trump on either trade or migration, while maintaining neutrality on Venezuela and welcoming Chinese money.