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Partial researchResearch snapshot 2026-09-13. Evidence gaps remain; see Coverage for requirements.

Office briefing

TLALCHAPA — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · TLALCHAPA / GUERRERO · municipal · Municipal governmentMX-M-12-65

Read the complete original research briefing

INE result distributions kept separate. Certified seats, supplementary elections, coalition and boundary audit remain.

1. What office, where, and when is the next election?

Geography
TLALCHAPA / GUERRERO
Next election
2027-06-06
Linked upcoming event
next-cdd38a76c86d6139f64dcd7d
Registry qualification
Unknown

2. How certain is that date?

2027-06-06 is expected (not formally called). Day precision. A date without a formal call is not confirmed.

3. Who won earlier selected elections?

2024

Special · Legal certification not established · candidate marks

  • PT_PVEM_MORENA87.1%
  • PAN_PRI_PRD6.8%
  • MC1.5%
  • PAC0.7%
  • PBG0.2%
Results for event-8c7da520060de2df8925f190
Label / candidateParty codeVotesShareSeatsStatus
PT_PVEM_MORENAmexico/S825553be60/20245,28087.1%UnknownRecorded
PAN_PRI_PRDmexico/S825553be60/20244126.8%UnknownRecorded
MCmexico/S825553be60/2024881.5%UnknownRecorded
PACmexico/S825553be60/2024410.7%UnknownRecorded
PBGmexico/S825553be60/2024110.2%UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • MORENA79.5%
  • PRI_PRD11.6%
  • PT_PVEM2.6%
  • PAN1.5%
Results for event-6991d6e04d2d3d3b545b89e2
Label / candidateParty codeVotesShareSeatsStatus
MORENAmexico/Sbd5108dc98/20214,75179.5%UnknownRecorded
PRI_PRDmexico/Sbd5108dc98/202169111.6%UnknownRecorded
PT_PVEMmexico/Sbd5108dc98/20211562.6%UnknownRecorded
PANmexico/Sbd5108dc98/2021911.5%UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PAN_PRD_MC80.1%
  • MORENA_ES9.0%
  • PVEM6.3%
  • PRI1.9%
  • PT0.2%
  • PPG0.0%
Results for event-2e22993aa04dd8bff9154509
Label / candidateParty codeVotesShareSeatsStatus
PAN_PRD_MCmexico/Se18ecdf431/20185,22280.1%UnknownRecorded
MORENA_ESmexico/Se18ecdf431/20185879%UnknownRecorded
PVEMmexico/Se18ecdf431/20184146.3%UnknownRecorded
PRImexico/Se18ecdf431/20181251.9%UnknownRecorded
PTmexico/Se18ecdf431/2018150.2%UnknownRecorded
PPGmexico/Se18ecdf431/201810%UnknownRecorded

4. Competition and volatility

competition index

Withheld

Unknown0–100 historical closeness

Actual-event and/or comparability review incomplete

Comparison status: Comparison unavailable · INE result distributions kept separate. Certified seats, supplementary elections, coalition and boundary audit remain.

Method ci.weighted-gap.v1. Inputs: latest_gap=null, oldest_gap=72.83155248271527, previous_gap=71.36579363684302

pedersen volatility

Withheld volatility

Unknownpercentage points

Grouped Pedersen lower bound (percentage points). Seven exact standalone INE party labels. Joint coalition combinations, independents and other parties remain Other, without allocating coalition votes. This coarse grouped comparison can conceal coalition-member shifts and requires the stated geographic/event review. An interval is withheld if either election has no list mapped to an explicit named group. This is aggregate share change, not individual voter switching. Event review: Actual-event and/or comparability review incomplete

Comparison status: Latest interval · Comparable grouped vectors unavailable for this interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Latest interval, vectors=[null,[1.599578133239585,0,0,0,0,0,83.5120407804535,14.888381086306909],[0,1.9641734758013827,0,0.23570081709616594,6.50534255185418,0,0,91.29478315524827]]

pedersen volatility

Provisional volatility

85.11percentage points

Grouped Pedersen lower bound (percentage points). Seven exact standalone INE party labels. Joint coalition combinations, independents and other parties remain Other, without allocating coalition votes. This coarse grouped comparison can conceal coalition-member shifts and requires the stated geographic/event review. An interval is withheld if either election has no list mapped to an explicit named group. This is aggregate share change, not individual voter switching. Event review: Actual-event and/or comparability review incomplete

Comparison status: Previous interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Previous interval, vectors=[null,[1.599578133239585,0,0,0,0,0,83.5120407804535,14.888381086306909],[0,1.9641734758013827,0,0.23570081709616594,6.50534255185418,0,0,91.29478315524827]]

pedersen volatility

Withheld volatility

Unknownpercentage points

Grouped Pedersen lower bound (percentage points). Seven exact standalone INE party labels. Joint coalition combinations, independents and other parties remain Other, without allocating coalition votes. This coarse grouped comparison can conceal coalition-member shifts and requires the stated geographic/event review. An interval is withheld if either election has no list mapped to an explicit named group. This is aggregate share change, not individual voter switching. Event review: Actual-event and/or comparability review incomplete

Comparison status: Both intervals mean · Comparable grouped vectors unavailable for this interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Both intervals mean, vectors=[null,[1.599578133239585,0,0,0,0,0,83.5120407804535,14.888381086306909],[0,1.9641734758013827,0,0.23570081709616594,6.50534255185418,0,0,91.29478315524827]]

Source-reported control: Unverified. Current tenure requires separate dated evidence.

5. Officeholder evidence

Dated roster observations are not automatically current tenure. The source current-office flag means this office is tracked now, not that the last winner still holds it.

No officeholder observation supplied.

6. Polling context

No local poll supplied.

7. Unresolved issues and sources

  • other · open

    Reconciliation required: {"id": "MX-M-12-65", "year": 2024, "issue": "Reconciliation required", "total_delta": 1.0, "duplicate_actor": false, "segments": 1}

Sources

Cite this record

Center for Digital Democracy. “TLALCHAPA — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-12-65. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--S825553be60, mexico--Sbd5108dc98, mexico--Se18ecdf431.