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

Office briefing

Tamesis — Mayor

Tracked current office. Identifiers stay separate from display names.

Colombia · Tamesis / Antioquia · municipal · MayorCO-ALC-05789

Read the complete original research briefing

Expected ordinary election on the last Sunday of October; formal call and 2027 roster require refresh. CEDE/Registraduría ordinary returns V2. Shares exclude blank and invalid ballots. Changing coalition labels and current control are not harmonized. Repeats, annulments and opposition-seat acceptance require certification review.

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

Geography
Tamesis / Antioquia
Next election
2027-10-31
Linked upcoming event
next-997327d438f8c8f878734e9f
Registry qualification
Unknown

2. How certain is that date?

2027-10-31 is expected (not formally called). Day precision. A date without a formal call is not confirmed.

3. Who won earlier selected elections?

2023

Ordinary · Legal certification not established · list votes

  • TAMESIS AVANZA54.9%
  • TAMESIS UNIDOS DEFENDEMOS EL TERRITORIO38.2%
  • PARTIDO SOCIAL DE UNIDAD NACIONAL - PARTIDO DE LA U6.9%
Results for event-bc53b0909b9cca8a5639d110
Label / candidateParty codeVotesShareSeatsStatus
TAMESIS AVANZA · Juan Pablo Perez Ramirez20232015colombia/Sdc3a3f1f89/20234,85654.9%UnknownRecorded
TAMESIS UNIDOS DEFENDEMOS EL TERRITORIO · Sergio Stiven Ruiz Ossa20232016colombia/Sdc3a3f1f89/20233,37738.2%UnknownRecorded
PARTIDO SOCIAL DE UNIDAD NACIONAL - PARTIDO DE LA U · Hernando De Jesus Espinal Ramirez20050002colombia/Sdc3a3f1f89/20236076.9%UnknownRecorded

2019

Ordinary · Legal certification not established · list votes

  • PARTIDO CONSERVADOR COLOMBIANO67.6%
  • PARTIDO ALIANZA SOCIAL INDEPENDIENTE - ASI32.4%
Results for event-7612f5b28d42df7e425eea3a
Label / candidateParty codeVotesShareSeatsStatus
PARTIDO CONSERVADOR COLOMBIANO · Juan Martin Vasquez Hincapie18490002colombia/S67eb704c85/20194,64667.6%UnknownRecorded
PARTIDO ALIANZA SOCIAL INDEPENDIENTE - ASI · Gustavo Adolfo Marin Taborda19910006colombia/S67eb704c85/20192,22232.4%UnknownRecorded

2015

Ordinary · Legal certification not established · list votes

  • PARTIDO CONSERVADOR COLOMBIANO66.9%
  • PARTIDO SOCIAL DE UNIDAD NACIONAL - PARTIDO DE LA U32.9%
  • MOVIMIENTO AUTORIDADES INDIGENAS DE COLOMBIA - AICO0.2%
Results for event-0c6a51d027b2906820190db7
Label / candidateParty codeVotesShareSeatsStatus
PARTIDO CONSERVADOR COLOMBIANO · Ivan Alexander Zuluaga Zuluaga18490002colombia/S8164286948/20155,86466.9%UnknownRecorded
PARTIDO SOCIAL DE UNIDAD NACIONAL - PARTIDO DE LA U · Margarita Maria Moncada Zapata20050002colombia/S8164286948/20152,88432.9%UnknownRecorded
MOVIMIENTO AUTORIDADES INDIGENAS DE COLOMBIA - AICO · Juan Alberto Ledesma Jaramillo19910001colombia/S8164286948/2015170.2%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

0 (recorded zero)0–100 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=16.730769230769226, oldest_gap=33.998859098687966, previous_gap=35.29411764705882

pedersen volatility

Provisional volatility

100percentage points

Grouped Pedersen lower bound (percentage points). Ten exact standalone national-party labels. Mixed coalitions, unidentified CEDE codes and other lists stay Other. Changes in coalition participation are not resolved into constituent-party votes. Geographic and actual-event audits remain open. 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=["Conservador","Liberal","La U","Cambio Radical","Centro Democratico","Alianza Verde","ASI","MAIS","Polo","AICO","Other"], interval=Latest interval, vectors=[[0,0,6.866515837104072,0,0,0,0,0,0,0,93.13348416289593],[67.6470588235294,0,0,0,0,0,32.35294117647059,0,0,0,0],[66.90245293782088,0,32.90359383913292,0,0,0,0,0,0,0.1939532230462065,0]]

pedersen volatility

Provisional volatility

33.1percentage points

Grouped Pedersen lower bound (percentage points). Ten exact standalone national-party labels. Mixed coalitions, unidentified CEDE codes and other lists stay Other. Changes in coalition participation are not resolved into constituent-party votes. Geographic and actual-event audits remain open. 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=["Conservador","Liberal","La U","Cambio Radical","Centro Democratico","Alianza Verde","ASI","MAIS","Polo","AICO","Other"], interval=Previous interval, vectors=[[0,0,6.866515837104072,0,0,0,0,0,0,0,93.13348416289593],[67.6470588235294,0,0,0,0,0,32.35294117647059,0,0,0,0],[66.90245293782088,0,32.90359383913292,0,0,0,0,0,0,0.1939532230462065,0]]

pedersen volatility

Provisional volatility

66.55percentage points

Grouped Pedersen lower bound (percentage points). Ten exact standalone national-party labels. Mixed coalitions, unidentified CEDE codes and other lists stay Other. Changes in coalition participation are not resolved into constituent-party votes. Geographic and actual-event audits remain open. 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=["Conservador","Liberal","La U","Cambio Radical","Centro Democratico","Alianza Verde","ASI","MAIS","Polo","AICO","Other"], interval=Both intervals mean, vectors=[[0,0,6.866515837104072,0,0,0,0,0,0,0,93.13348416289593],[67.6470588235294,0,0,0,0,0,32.35294117647059,0,0,0,0],[66.90245293782088,0,32.90359383913292,0,0,0,0,0,0,0.1939532230462065,0]]

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.

National context is listed on the polling page. It is not a local forecast.

7. Unresolved issues and sources

Expected ordinary election on the last Sunday of October; formal call and 2027 roster require refresh. CEDE/Registraduría ordinary returns V2. Shares exclude blank and invalid ballots. Changing coalition labels and current control are not harmonized. Repeats, annulments and opposition-seat acceptance require certification review. Six 2023 assemblies remain absent: Amazonas, Guainía, Huila, Risaralda, Vaupés and Vichada. Cali’s 37 JAL boards and dated membership rosters are registered; the national JAL register, three-cycle votes and replacement-event final returns remain incomplete. Twenty mixed-list-type histories, Bogotá and Cali 2015 partial counts and candidate/elected-flag inconsistencies require reconciliation. The national historical portal rejected this browser through security screening. Full legal seat allocation is separate from candidate flags and directory headcounts.

    Sources

    Cite this record

    Center for Digital Democracy. “Tamesis — Mayor.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/CO-ALC-05789. Sources: colombia--url-44e0af24e3fef22401f2d269, colombia--url-f8cbad13a2c7112410d7a492, colombia--url-142631271ac95a7106b17681, colombia--Sdc3a3f1f89, colombia--S67eb704c85, colombia--S8164286948.