ASUNCIÓN, Paraguay (AP) — The most notable thing about the Mercosur trade bloc's meetings on Sunday in Paraguay was an absence — that of Argentine President Javier Milei. With the Argentine populist skipping the summit to star at a right-wing rally in Brazil, South America's biggest trade bloc — politically divided, notoriously slow-moving and beset by backsliding — faces an uncertain future. Milei has advocated for pulling Argentina, a leader of the alliance, out of the agreement altogether.