This is a big deal. The Partido Revolucionario Institucional (PRI) the party that ruled Mexico exclusively for 70 years will benefit the most.
The Mexico national supreme court has upheld a law passed by the Mexican state legislature which bans informal coalition candidates in state elections.
The law was passed in September under the urging of Mexico state governor Enrique Peña Nieto.
Enrique Peña Nieto is considered to be PRI's top candidate for the 2012 presidential elections.
Despite recent elections in Mexico in which the main opposition to PRI, the Partido Acción Nacional (PAN), has made large gains at all levels against the PRI, including two back to back presidential terms, the gains are considered to be endangered.
For example, last summer's gubernatorial elections affecting 14 states, PAN ended up with no net gain against PRI in state governor's seats, despite a sitting PAN president, Felipe Calderon.
The new law ends a practice of local parties in Mexico state to put up informal coalition candidates to oppose the more popular PRI. PAN and the Partido de la Revolución Democrática (PRD) have entered several coalition candidates throughout Mexico, including Mexico state to oppose the PRI.
PAN and PRD both oppose the law and the court decision.
The state leader of the PRD, Luis Sanchez Jimenez called the decision "regressive" and said he will go to the Mexican Human Right Commision for help.
Sanchez Jimenez also termed the decision a "wedding gift."
Peña Nieto was wed last to Televisa's soap opera actress Angélica Rivera November 27th in a highly publicized ceremony in a wedding dubbed by Mexican journalists as a "Mexican Camelot."