Mexico City, September 22 (teleSUR-RHC)-- The left-leaning Democratic Revolution Party (PRD) decided to seek electoral alliances with the right-wing National Action Party (PAN) during its congress in Mexico City over the past weekend.

Participants in the congress approved a series of motions for the party, including electoral alliances with the PAN under “certain conditions and for specific purposes only.”

The PRD has been criticized before by grassroots members of the party for making alliances with the right-wing party, its ideological opposite.

Political alliances must be approved by the PRD's national executive. The party rejected outright any electoral cooperation with the ruling Institutional Revolutionary Party (PRI) of President Enrique Peña Nieto.

The PRD also unanimously approved a special resolution concerning the case of the 43 forcibly disappeared Ayotzinapa teachers training college students in the town of Iguala, in the southern state of Guerrero.

Voters subsequently punished the PRD for their role in the crime. Many activists abandoned the party for the upstart Movement for National Regeneration (MORENA), led by former Mexico City mayor, ex-PRD leader and two-time presidential candidate, Andres Manuel Lopez Obrador.

The resolution calls on the party to “demand accountability from the party leaders who were responsible or jointly responsible for having promoted the candidacy of Jose Luis Abarca for mayor of Iguala.”

The resolution also backed the report issued by a team of experts from the Inter-American Commission on Human Rights, which argued that the government's version of events was inconsistent with their independent investigation.

The PRD also criticized the federal attorney general's office for the way they carried out the investigation into the missing students, while calling on the government of Peña Nieto to reopen the investigation.