Well, during the Cold War there were attempts to create other "NATO" alliances by the US. These included both the Middle East Treaty Organization (METO)/Central Treaty Organization (CENTO) (which the US wasn't part of directly due to political reasons), and the Southeast Asia Treaty Organization (SEATO) as well as the Inter-American Treaty of Reciprocal Assistance (TIAR), which was a proto alliance that never really got off the ground due to US actions in the region. So maybe Washington pushes for a South America Treaty Organization (SATO) as well-organized TIAR replacement to help round out its alliance system?