Yes. From 1929 until the 2000 presidential elections, PRI was the leading party in Mexico.
PRI
It is the other way around. The majority of the unions in Mexico are affiliated, and controled, by the PRI. This has changed slightly over the last 10 yrs or so since PRI lost power, though Mexican "sindicatos patronales" are PRI owned.
PRI
PRI
The Partido Accion Nacional or PAN.
Partido Revolucionario Institucional (PRI)
Ernesto Zedillo (term: 1994-2000) qualifies as such.
David Cameron - The Conservative Party
The Partido Revolucionario Institucional, or PRI.
The Institutional Revolutionary Party (PRI), whose members held the presidential seat for more than 70 years in Mexico.
I guess you mean who is the leader of Mexico. He would be the Mexican president, who acts both as head of state and head of government. The PRI Party just succeeded the PAN party in Mexico.
mayor