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

Office briefing

ATLTZAYANCA — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · ATLTZAYANCA / TLAXCALA · municipal · Municipal governmentMX-M-29-5

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
ATLTZAYANCA / TLAXCALA
Next election
2027-06-06
Linked upcoming event
next-5b8b302b321e3e3358d3fdb2
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

  • PAN24.5%
  • MORENA20.1%
  • PRI13.5%
  • MC12.8%
  • PT10.5%
  • PVEM7.3%
  • FXM3.1%
  • PAC3.0%
  • PANALT1.2%
  • RSP0.3%
  • PRD0.0%
Results for event-9ba486753d9753dad3e8d41e
Label / candidateParty codeVotesShareSeatsStatus
PANmexico/S3f99807cc9/20242,68324.5%UnknownRecorded
MORENAmexico/S3f99807cc9/20242,20020.1%UnknownRecorded
PRImexico/S3f99807cc9/20241,47513.5%UnknownRecorded
MCmexico/S3f99807cc9/20241,40612.8%UnknownRecorded
PTmexico/S3f99807cc9/20241,14910.5%UnknownRecorded
PVEMmexico/S3f99807cc9/20247987.3%UnknownRecorded
FXMmexico/S3f99807cc9/20243453.1%UnknownRecorded
PACmexico/S3f99807cc9/20243253%UnknownRecorded
PANALTmexico/S3f99807cc9/20241311.2%UnknownRecorded
RSPmexico/S3f99807cc9/2024290.3%UnknownRecorded
PRDmexico/S3f99807cc9/20240 (recorded zero)0% (recorded zero)UnknownRecorded

2021

Special · Legal certification not established · candidate marks

  • PRI26.1%
  • PVEM25.0%
  • PAN20.1%
  • MORENA10.2%
  • PRD9.1%
  • RSP2.5%
  • MC1.4%
  • PT0.9%
  • PAC0.7%
  • PISSI0.3%
  • PANALT0.3%
  • PES0.1%
  • PS0.0%
  • PEST0.0%
  • FXM0.0%
Results for event-14743127c03bef98adb6aeb6
Label / candidateParty codeVotesShareSeatsStatus
PRImexico/S89add8fb1e/20212,66526.1%UnknownRecorded
PVEMmexico/S89add8fb1e/20212,55325%UnknownRecorded
PANmexico/S89add8fb1e/20212,05020.1%UnknownRecorded
MORENAmexico/S89add8fb1e/20211,04210.2%UnknownRecorded
PRDmexico/S89add8fb1e/20219359.1%UnknownRecorded
RSPmexico/S89add8fb1e/20212522.5%UnknownRecorded
MCmexico/S89add8fb1e/20211381.4%UnknownRecorded
PTmexico/S89add8fb1e/2021930.9%UnknownRecorded
PACmexico/S89add8fb1e/2021670.7%UnknownRecorded
PISSImexico/S89add8fb1e/2021350.3%UnknownRecorded
PANALTmexico/S89add8fb1e/2021270.3%UnknownRecorded
PESmexico/S89add8fb1e/2021150.1%UnknownRecorded
PSmexico/S89add8fb1e/20210 (recorded zero)0% (recorded zero)UnknownRecorded
PESTmexico/S89add8fb1e/20210 (recorded zero)0% (recorded zero)UnknownRecorded
FXMmexico/S89add8fb1e/20210 (recorded zero)0% (recorded zero)UnknownRecorded

2016

Special · Legal certification not established · candidate marks

  • PRI39.4%
  • PRD25.1%
  • PAC16.9%
  • PVEM5.5%
  • PAN4.6%
  • MORENA2.9%
  • PT0.5%
  • ES0.5%
  • MC0.3%
  • PS0.3%
Results for event-9b63c46413c8ac57fe228950
Label / candidateParty codeVotesShareSeatsStatus
PRImexico/Se223962d13/20163,57939.4%UnknownRecorded
PRDmexico/Se223962d13/20162,27925.1%UnknownRecorded
PACmexico/Se223962d13/20161,53716.9%UnknownRecorded
PVEMmexico/Se223962d13/20164965.5%UnknownRecorded
PANmexico/Se223962d13/20164214.6%UnknownRecorded
MORENAmexico/Se223962d13/20162652.9%UnknownRecorded
PTmexico/Se223962d13/2016490.5%UnknownRecorded
ESmexico/Se223962d13/2016470.5%UnknownRecorded
MCmexico/Se223962d13/2016290.3%UnknownRecorded
PSmexico/Se223962d13/2016260.3%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

77.10–100 historical closeness

Actual-event and/or comparability review incomplete

Comparison status: Provisional imported-series comparison; actual-event review open

Method ci.weighted-gap.v1. Inputs: latest_gap=4.5821079593966445, oldest_gap=14.894592117323558, previous_gap=1.1345218800648311

pedersen volatility

Provisional volatility

40.76percentage 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=[[25.45299307466085,13.992979793188502,0,10.900294089744806,7.570439237264017,13.338392941846125,20.870885115264205,7.874015748031495],[20.76580226904376,26.99554294975689,9.471231766612641,0.9420583468395461,25.861021069692057,1.3978930307941653,10.555105348460291,4.011345218800648],[4.823556370302475,41.00595783684693,26.111365719523373,0.5614115490375802,5.682859761686526,0.33226397800183316,3.036205316223648,18.446379468377632]]

pedersen volatility

Provisional volatility

45.09percentage 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=[[25.45299307466085,13.992979793188502,0,10.900294089744806,7.570439237264017,13.338392941846125,20.870885115264205,7.874015748031495],[20.76580226904376,26.99554294975689,9.471231766612641,0.9420583468395461,25.861021069692057,1.3978930307941653,10.555105348460291,4.011345218800648],[4.823556370302475,41.00595783684693,26.111365719523373,0.5614115490375802,5.682859761686526,0.33226397800183316,3.036205316223648,18.446379468377632]]

pedersen volatility

Provisional volatility

42.92percentage 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

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Both intervals mean, vectors=[[25.45299307466085,13.992979793188502,0,10.900294089744806,7.570439237264017,13.338392941846125,20.870885115264205,7.874015748031495],[20.76580226904376,26.99554294975689,9.471231766612641,0.9420583468395461,25.861021069692057,1.3978930307941653,10.555105348460291,4.011345218800648],[4.823556370302475,41.00595783684693,26.111365719523373,0.5614115490375802,5.682859761686526,0.33226397800183316,3.036205316223648,18.446379468377632]]

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

No open research issues attached to this office.

Sources

Cite this record

Center for Digital Democracy. “ATLTZAYANCA — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-29-5. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--S3f99807cc9, mexico--S89add8fb1e, mexico--Se223962d13.