To follow Latin American news in English language sources I recommend that you subscribe to the news summary (4 to 5 days per week) of the Washington-based Center for Economic and Policy Research. This is a liberal-left think-tank that will send you regular digests, organized by region, with direct links to the articles. Here is the link:
http://salsa.democracyinaction.org/o/967/t/9788/signUp.jsp?key=1013