In1973 Mexican legislative election the Institutional Revolutionary Party got the highest votes of 10,458,618 while the National Action Party got the 2nd highest votes of 2,207,069.
Institutional Revolutionary Party 10,458,618 77.4 National Action Party 2,207,069 16.3 Popular Socialist Party 541,833 4.0 Authentic Party of the Mexican Revolution 272,339 2.0 Non-registered candidates 36,858 0.3 
