Ecuador is expelling US Ambassador Heather Hodges over critical comments in a WikiLeaks cable. Her ouster follows the resignation last month of the US ambassador to Mexico over another controversial cable.
Trade opportunities and strengthened ties top the agenda as President Obama flies to Brazil, Chile, and El Salvador over the next five days.
WikiLeaks' trove of 250,000 cables will probably not damage US relations in Latin America, experts say, but some regional leaders are seizing the opportunity to lambast the Washington.
In a statement Tuesday, Latin American leaders back Argentina view that British oil drilling off the Falkland Islands is a violation of its sovereignty.
British companies are set to begin drilling for oil reserves off the Falkland Islands this week, reopening a dispute with Argentina, which still lays claim to the archipelago.
Brazil's largest trading partner is no longer the US – it's China. Beijing is investing billions of dollars and filling a vacuum left by the United States.
President Cristina Fernandez de Kirchner's Peronist Party lost power in both houses of Congress in Sunday's legislative elections. Her husband, former President Nestor Kirchner, lost in his bid for a congressional seat.
The president's approval rating skyrocketed to 90 percent after the military freed 15 high-profile hostages from a jungle rebel camp.