The Institutional Revolutionary Party (PRI) of Mexico won all the elections from 1930 to 2000. The opposition parties did contest elections, but never managed win. The PRI used many dirty tricks to attend the elections. (i) All the government employees had to attend the party meetings of PRI. (ii) Teachers of government schools advised and sometimes forced the parents for casting their votes in favour of PRI. (iii) Media always criticised the opposition parties but ignored their good effort. (iv) Sometimes the Polling booths are shifted from one place to another without prior notice. It tried to hamper the election procedure. (v) Being in power, the PRI spent a large sum of money to manipulate the election and the campaign for the candidate. In Mexico people seemed to really have a choice, but in reality they had no choice, but to cast their vote in favour of the PRI.