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

Office briefing

MIGUEL ALEMAN — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · MIGUEL ALEMAN / TAMAULIPAS · municipal · Municipal governmentMX-M-28-25

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
MIGUEL ALEMAN / TAMAULIPAS
Next election
2027-06-06
Linked upcoming event
next-d9449d303110da687716c33d
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

  • PAN_PRI46.5%
  • PT_PVEM_MORENA38.0%
  • MC12.2%
  • PRD0.3%
Results for event-695b6787872d4953b801c021
Label / candidateParty codeVotesShareSeatsStatus
PAN_PRImexico/S94ad7f1278/20245,59746.5%UnknownRecorded
PT_PVEM_MORENAmexico/S94ad7f1278/20244,57838%UnknownRecorded
MCmexico/S94ad7f1278/20241,47412.2%UnknownRecorded
PRDmexico/S94ad7f1278/2024370.3%UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • PAN45.8%
  • PRI30.6%
  • PVEM13.7%
  • PT_MORENA7.3%
  • FXM0.3%
  • PES0.2%
  • MC0.1%
  • PRD0.1%
  • RSP0.0%
Results for event-b5eca292c7a26d3e2f817292
Label / candidateParty codeVotesShareSeatsStatus
PANmexico/S6e8c26e371/20215,38845.8%UnknownRecorded
PRImexico/S6e8c26e371/20213,59530.6%UnknownRecorded
PVEMmexico/S6e8c26e371/20211,61113.7%UnknownRecorded
PT_MORENAmexico/S6e8c26e371/20218567.3%UnknownRecorded
FXMmexico/S6e8c26e371/2021400.3%UnknownRecorded
PESmexico/S6e8c26e371/2021210.2%UnknownRecorded
MCmexico/S6e8c26e371/2021140.1%UnknownRecorded
PRDmexico/S6e8c26e371/2021120.1%UnknownRecorded
RSPmexico/S6e8c26e371/202140%UnknownRecorded

2018

Special · Legal certification not established · candidate marks

  • PRI43.5%
  • PAN_PRD_MC28.7%
  • PT_MORENA_ES24.7%
  • PANAL0.2%
  • PVEM0.2%
Results for event-0ac0fcbac75423240cd713c0
Label / candidateParty codeVotesShareSeatsStatus
PRImexico/S314e523ce5/20185,38443.5%UnknownRecorded
PAN_PRD_MCmexico/S314e523ce5/20183,55628.7%UnknownRecorded
PT_MORENA_ESmexico/S314e523ce5/20183,06124.7%UnknownRecorded
PANALmexico/S314e523ce5/2018300.2%UnknownRecorded
PVEMmexico/S314e523ce5/2018190.2%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=8.719835700838608, oldest_gap=null, previous_gap=15.535915431938307

pedersen volatility

Provisional volatility

91.79percentage 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

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Latest interval, vectors=[[0,0,0.3166181755947287,0,0,12.613383535854869,0,87.06999828855041],[46.68572913958929,31.149813707650985,0.10397712503249285,0,13.958929035612165,0.12130664587124167,0,7.980244346243826],null]

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: Previous interval · Comparable grouped vectors unavailable for this interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Previous interval, vectors=[[0,0,0.3166181755947287,0,0,12.613383535854869,0,87.06999828855041],[46.68572913958929,31.149813707650985,0.10397712503249285,0,13.958929035612165,0.12130664587124167,0,7.980244346243826],null]

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=[[0,0,0.3166181755947287,0,0,12.613383535854869,0,87.06999828855041],[46.68572913958929,31.149813707650985,0.10397712503249285,0,13.958929035612165,0.12130664587124167,0,7.980244346243826],null]

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-28-25", "year": 2018, "issue": "Reconciliation required", "total_delta": 2.0, "duplicate_actor": false, "segments": 1}

Sources

Cite this record

Center for Digital Democracy. “MIGUEL ALEMAN — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-28-25. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--S94ad7f1278, mexico--S6e8c26e371, mexico--S314e523ce5.