sentences:  Consequently, the PRI's left wing separated and formed its own party, the Party of the Democratic Revolution (PRD) in 1989.Critics claim electoral fraud, with voter suppression and violence, was used when the political machine did not work and elections were just a ritual to simulate the appearance of a democracy.However, the three major parties now make the same claim against each other (PRD against Vicente Fox's PAN and PAN vs. López Obrador's PRD, and the PRI against the PAN at the local level and local elections such as the 2007 Yucatán state election).