Answer:
False
Explanation:
The Mexican government prior to 2000 was actually very unstable and characterized by many fraudulent activities.
In the early 1900s, the Mexican Revolution broke out, the aftermath of which resulted in many generals taking control of the country. Later, in the 1980s, there was the 1988 election which was called the "most fraudulent in Mexico's history" (Schmidt, "Politics and Government, 1946-1996", p. 1126.).
And, only one political party really dominated: the Institutional Revolutionary Party, which won elections throughout the 1900s.
Thus, this is false.
