Numerous electoral reforms implemented since 1989 have progressively opened the Mexican political system, and opposition parties have made historic gains in elections at all levels. At the same time, this opening has left Mexico’s political institutions divided. Fox is credited with ending one-party rule and consolidating the opening of Mexico’s political system. Under Fox, Mexico’s highest office became a true constitutional presidency, considerably weakened in comparison to the PRI years by the PAN’s lack of control over the Congress. | Numerous electoral reforms implemented since 1989 have progressively opened the Mexican political system, and opposition parties have made historic gains in elections at all levels. At the same time, this opening has left Mexico’s political institutions divided. Fox is credited with ending one-party rule and consolidating the opening of Mexico’s political system. Under Fox, Mexico’s highest office became a true constitutional presidency, considerably weakened in comparison to the PRI years by the PAN’s lack of control over the Congress. |