In 2016, Maduro again claimed that the United States was attempting to assist the opposition with a coup attempt. On 12 January 2016, Secretary General of the Organization of American States (OAS), Luis Almagro, threatened to invoke the Inter-American Democratic Charter, an instrument used to defend democracy in the Americas when threatened, when opposition National Assembly member were barred from taking their seats by the Maduro-aligned Supreme Court. Human rights organizations such as Human Rights Watch, and the Human Rights Foundation called for the OAS to invoke the Democratic Charter. After more controversies and pursuing a recall on Maduro, on 2 May 2016, opposition members of the National Assembly met with OAS officials to ask for the body to implement the Democratic Charter. Two days later on 4 May, the Maduro government called for a meeting the next day with the OAS, with Venezuelan Foreign Minister Delcy Rodríguez stating that the United States and the OAS were attempting to overthrow Maduro. On 17 May 2016 in a national speech, Maduro called OAS Secretary General Luis Almagro "a traitor" and stated that he worked for the CIA. Almagro sent a letter rebuking Maduro, and refuting the claim.