In an effort to reverse this legislation and facilitate opposition electoral alliances, the PRD, the National Action Party (PAN), the Labor Party (PT) and the Ecological Green Party (PVEM) renewed their alliance within the Mexican House of Representatives in late April.
A finales de abril de 1999, en la Cámara de Diputados, y con vistas a facilitar las alianzas opositoras, se renovó la alianza entre las cuatro fracciones (PAN, PRD, PT y PVEM).