How has party fragmentation evolved in Mexican politics after the PRI's decline?

How has party fragmentation evolved in Mexican politics after the PRI's decline?

• A. The party system remained single-party dominated
• B. New parties emerged (MORENA, etc.), increasing multiparty competition and coalitions
• C. All parties merged into a single party
• D. The PRI regained dominance

Answer: (B)

The main idea here is that Mexico’s party system has become more plural and fragmented since the PRI’s decline. When the PRI’s long dominance waned, new parties rose to take its place—most notably MORENA—along with other entrants and realignments. This brought a broader field of parties competing for elections and governance, rather than one party dominating outcomes. In a mixed electoral system like Mexico’s, where seats come from both districts and proportional representation, smaller and new parties can gain influence and form coalitions to win presidential races or legislative majorities. So, competition increased and alliances—often across party lines—became a routine feature of Mexican politics. This is why the rise of new parties and coalition-building best captures how fragmentation evolved.

The main idea here is that Mexico’s party system has become more plural and fragmented since the PRI’s decline. When the PRI’s long dominance waned, new parties rose to take its place—most notably MORENA—along with other entrants and realignments. This brought a broader field of parties competing for elections and governance, rather than one party dominating outcomes. In a mixed electoral system like Mexico’s, where seats come from both districts and proportional representation, smaller and new parties can gain influence and form coalitions to win presidential races or legislative majorities. So, competition increased and alliances—often across party lines—became a routine feature of Mexican politics. This is why the rise of new parties and coalition-building best captures how fragmentation evolved.