PRI was called Institutional Revolutionary party of Mexico.
Dirty tricks:-
1. all government employees had to attend party meetings.
2. teachers of government schools forced the parents to vote for the PRI.
3.PRI spent large amount of money in the campaining.
4.Media igonred the opposition parties except to criticize them.

PRI (Institutional Revolutionary Party) in Mexico

The PRI (Institutional Revolutionary Party) is a political party in Mexico that dominated the country's political landscape for over 70 years, from 1929 to 2000. During its reign, the PRI employed various strategies, including what are commonly referred to as "dirty tricks," to win elections and maintain its power. Here are four of these tactics:

1. Clientelism and Patronage
Clientelism and patronage are key components of the PRI's electoral strategy. The party established close relationships with various interest groups, such as labor unions, peasants, and different social organizations. Through these ties, the PRI could provide benefits and resources to its supporters in exchange for their political loyalty. This system created a dependency on the party and allowed the PRI to control vast networks of voters.

2. Vote Buying and Electoral Fraud
The PRI was notorious for using vote-buying tactics to secure electoral victories. This involved providing monetary incentives, gifts, or even food to voters in exchange for their support. Additionally, electoral fraud was often employed to manipulate election outcomes. This could include ballot stuffing, falsifying voter registration lists, or manipulating vote counts. These practices allowed the PRI to control election results and maintain its hold on power.

3. Control of Media and Disinformation
The PRI exerted significant control over the media during its rule. The party used state-owned media outlets to promote its agenda and ensure positive coverage. It also restricted the activities of independent media organizations and journalists who were critical of the government. Disinformation campaigns were employed to manipulate public opinion and discredit opposition parties, thereby influencing election outcomes.

4. Intimidation and Coercion
The PRI was notorious for using intimidation and coercion tactics to suppress opposition and maintain control. This included threats, violence, and even assassinations of political opponents. By creating a climate of fear, the PRI could discourage opposition supporters from participating in the political process, ensuring the success of their own candidates.

Overall, the PRI's strategies revolved around maintaining control over key institutions, controlling the narrative through media manipulation, and utilizing a combination of clientelism, electoral fraud, and intimidation to secure electoral victories. These tactics allowed the party to maintain its grip on power for several decades, although it eventually faced significant challenges and a decline in support leading to its loss of the presidency in 2000.