El dedazo ("the big finger") was the informal practice in Mexico's PRI era where the sitting president personally chose the party's next presidential candidate, effectively naming his own successor and locking in decades of one-party dominance until the practice ended in the late 1990s.
El dedazo, literally "the tap of the finger," was Mexico's worst-kept secret for most of the 20th century. The outgoing president would point at his chosen successor, that person would become the PRI's presidential candidate, and because the PRI dominated every election, the candidate basically became the next president. Voters technically voted, but the real decision happened inside one man's head.
This is what makes el dedazo such a useful AP Comp Gov example. It wasn't written into Mexico's constitution. It was an informal institution, an unwritten rule everyone followed, and it's how the PRI maintained a dominant party system without abolishing elections. Presidents served a single six-year term (the sexenio), so el dedazo was the mechanism that recycled power within the party instead of letting it pass to a rival. When the PRI moved to internal primaries in 1999 and Vicente Fox of the PAN won the presidency in 2000, the end of el dedazo became a textbook marker of Mexico's democratization.
El dedazo lives in Topic 4.3 (What are Political Party Systems?) in Unit 4, supporting learning objective AP Comp Gov 4.3.A, which asks you to describe characteristics of party systems across the course countries. The CED's essential knowledge (PAU-4.A.1) says party systems range from dominant party systems to multiparty systems, and Mexico under the PRI is the classic case of a dominant party system inside a country that still held elections. El dedazo is the how behind that dominance. Rules and practices that control candidate selection control who can win, which is the same logic the CED highlights for Russia's party registration requirements (PAU-4.A.3). It also connects to the broader course theme of democratization, since eliminating el dedazo is one of the concrete reforms you can cite when explaining Mexico's shift from a hybrid, one-party-dominant system toward competitive multiparty democracy.
Keep studying AP Comparative Government Unit 4
Dominant Party System (Unit 4)
El dedazo is the engine room of a dominant party system. Mexico held regular elections, but when one party's candidate is guaranteed to win, the real contest is who gets picked, and el dedazo put that pick in the president's hands. Compare it to Russia's tactic of restricting which parties can register; different tool, same goal of one-party dominance.
Patronage Politics (Unit 4)
El dedazo sat on top of a giant patronage machine. PRI loyalty was rewarded with jobs, contracts, and candidacies, and the dedazo was the ultimate prize at the top of that ladder. Ambitious politicians stayed loyal to the president because crossing him meant the finger would never point at you.
Hybrid Regime (Units 1 and 4)
PRI-era Mexico is a go-to example of a hybrid regime, one with democratic forms (elections, a constitution, term limits) but authoritarian practice. El dedazo is the perfect one-sentence proof, since succession was decided by one person rather than by voters.
Accountability (Units 2 and 4)
Candidate selection is an accountability question. When a party's nominee answers to the outgoing president instead of to primary voters or party members, vertical accountability breaks down. Ending el dedazo through internal primaries rerouted that accountability back toward citizens, which is why it counts as a democratizing reform.
El dedazo shows up most often in multiple-choice questions about Mexico's transition away from one-party dominance. Typical stems ask which reform reduced the PRI's control over candidate selection or presidential succession, and the answer hinges on knowing that replacing el dedazo with internal party primaries (starting in 1999) broke the president's grip on naming his successor. You might also see it framed as "what practice did Mexico eliminate to reduce presidential power?" No released FRQ has used the term verbatim, but it's strong evidence for conceptual analysis or argument essays about democratization, informal institutions, or how dominant party systems maintain power. The key move is being specific. Don't just say "Mexico became more democratic"; say the PRI ended el dedazo, adopted primaries, and lost the presidency to the PAN's Vicente Fox in 2000.
Patronage is the broad practice of trading government jobs and benefits for political loyalty, and it exists in lots of systems. El dedazo is one very specific Mexican version, the president's informal power to handpick the PRI's next presidential candidate. Think of patronage as the whole reward system and el dedazo as its single most powerful reward. On the exam, use "patronage" for general loyalty-for-benefits arguments and "el dedazo" only for PRI presidential succession.
El dedazo was the informal practice where Mexico's sitting president personally selected the PRI's next presidential candidate, effectively choosing his own successor.
It was never a written law; it's a textbook example of an informal institution shaping who actually holds power.
El dedazo explains how the PRI maintained a dominant party system for decades while still holding regular elections, supporting AP Comp Gov 4.3.A.
The PRI replaced el dedazo with internal primaries in 1999, and the PAN's Vicente Fox won the presidency in 2000, marking Mexico's shift toward competitive multiparty democracy.
On the exam, ending el dedazo is one of the most concrete reforms you can cite as evidence of Mexico's democratization and reduced presidential power.
El dedazo ("the big finger") was the informal Mexican practice where the outgoing president handpicked the PRI's next presidential candidate. Because the PRI dominated elections for most of the 20th century, that pick essentially decided who became president.
No. El dedazo was never written into Mexico's constitution or legal code. It was an unwritten norm everyone in the PRI followed, which is exactly why AP Comp Gov uses it as a classic example of an informal institution with real power.
The PRI abandoned the practice in 1999 when it held its first internal presidential primary instead of letting the president name the candidate. The next year, Vicente Fox of the PAN won the 2000 presidential election, ending 71 years of PRI control of the presidency.
Patronage is the general exchange of government jobs and benefits for political loyalty, found in many countries. El dedazo is one specific Mexican practice within that system, the president's power to pick the PRI's presidential successor. All dedazo is patronage-adjacent, but most patronage isn't el dedazo.
Because it moved candidate selection from one unaccountable person to party members and, ultimately, competitive elections. When succession is decided by primaries and voters instead of a presidential finger-point, vertical accountability improves, which is the core of a democratic transition.
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