San Francisco 2010 Municipal Election - District 10

The San Francisco 2010 Municipal Election - District 10 took place on 2010-11-02. Malia Cohen won after 20 runoff rounds, and was also the Condorcet winner.

Runoff Rounds

This diagram shows the votes of each remaining candidate at each round, as well as the breakdown of votes transferred when each candidate was eliminated.

Lynette Sweet Tony Kelly Malia Cohen Marlene Tran Steve Moss Teresa Duque Dewitt M. Lacy Chris Jackson Kristine Enea Eric Smith James M. Calloway Diane Wesley Smith Geoffrea Morris Stephen Weber Ashley H Rhodes Rodney Hampton, Jr. Ed Donaldson Jackie Norman Nyese Joshua M.J. Marie Franklin Ellsworth ''Ell'' Jennison Write-in Exhausted Ballot Malia Cohen Tony Kelly Exhausted BallotRound 1Round 2Round 3Round 4Round 5Round 6Round 7Round 8Round 9Round 10Round 11Round 12Round 13Round 14Round 15Round 16Round 17Round 18Round 19Round 20

Pairwise Preferences

For every pair of candidates, this table shows what fraction of voters preferred one to the other. A preference means that either a voter ranks a candidate ahead of the other, or ranks a candidate but does not list the other. Ballots which list neither candidate are not counted towards the percent counts.

Less PreferredMore PreferredLynette SweetTony KellyMalia CohenMarlene TranSteve MossTeresa DuqueDewitt M. LacyChris JacksonKristine EneaEric SmithJames M. CallowayDiane Wesley SmithGeoffrea MorrisStephen WeberAshley H RhodesRodney Hampton, Jr.Ed DonaldsonJackie NormanNyese JoshuaM.J. Marie FranklinEllsworth ''Ell'' JennisonWrite-inLynette SweetTony KellyMalia CohenMarlene TranSteve MossTeresa DuqueDewitt M. LacyChris JacksonKristine EneaEric SmithJames M. CallowayDiane Wesley SmithGeoffrea MorrisStephen WeberAshley H RhodesRodney Hampton, Jr.Ed DonaldsonJackie NormanNyese JoshuaM.J. Marie FranklinEllsworth ''Ell'' JennisonWrite-in50.6%48.1%54.3%51.4%59.5%54.3%54.7%76.0%71.8%80.2%81.1%84.9%84.7%88.3%86.3%87.1%88.9%91.1%92.6%94.1%99.0%49.4%47.3%52.6%50.5%58.4%58.4%56.9%75.5%71.0%78.1%78.3%83.1%84.2%87.1%83.4%87.3%86.6%91.2%92.0%94.2%98.9%51.9%52.7%56.0%53.3%61.2%54.1%56.7%77.1%77.9%80.9%82.6%86.0%85.2%89.0%86.3%87.0%89.4%91.6%92.8%94.8%99.0%45.7%47.4%44.0%47.2%60.1%49.1%49.6%71.8%66.5%76.6%75.7%81.5%82.0%85.6%81.3%83.5%85.0%89.4%91.9%93.3%98.7%48.6%49.5%46.7%52.8%58.2%52.1%52.5%75.9%70.9%78.4%78.4%83.0%84.9%87.0%83.9%85.7%86.3%90.5%92.0%94.3%98.8%40.5%41.6%38.8%39.9%41.8%43.7%43.7%66.9%61.6%71.6%71.6%77.4%78.0%82.5%78.2%79.9%82.0%87.3%90.7%91.9%98.4%45.7%41.6%45.9%50.9%47.9%56.3%53.9%72.7%72.8%76.5%76.8%82.3%81.9%86.0%82.6%84.5%85.6%89.7%91.5%93.3%98.8%45.3%43.1%43.3%50.4%47.5%56.3%46.1%72.6%68.5%76.8%77.1%82.0%82.4%86.3%82.9%86.5%85.8%89.4%91.3%93.4%98.7%24.0%24.5%22.9%28.2%24.1%33.1%27.3%27.4%44.9%55.0%55.6%63.1%64.2%69.9%63.9%67.1%69.7%76.7%80.0%84.6%96.7%28.2%29.0%22.1%33.5%29.1%38.4%27.2%31.5%55.1%60.7%61.2%68.3%68.4%74.5%69.2%71.7%73.6%80.0%83.0%86.9%97.2%19.8%21.9%19.1%23.4%21.6%28.4%23.5%23.2%45.0%39.3%50.7%58.3%59.1%66.3%59.4%62.2%65.0%73.5%76.8%81.9%95.8%18.9%21.7%17.4%24.3%21.6%28.4%23.2%22.9%44.4%38.8%49.3%57.1%57.7%65.3%58.6%61.3%65.6%72.5%76.3%81.4%95.9%15.1%16.9%14.0%18.5%17.0%22.6%17.7%18.0%36.9%31.7%41.7%42.9%50.6%58.2%51.6%54.6%57.2%65.8%70.2%76.2%94.5%15.3%15.8%14.8%18.0%15.1%22.0%18.1%17.6%35.8%31.6%40.9%42.3%49.4%57.7%50.5%53.6%56.7%65.4%69.4%75.9%94.2%11.7%12.9%11.0%14.4%13.0%17.5%14.0%13.7%30.1%25.5%33.7%34.7%41.8%42.3%42.3%46.3%49.0%58.2%63.1%69.9%92.4%13.7%16.6%13.7%18.7%16.1%21.8%17.4%17.1%36.1%30.8%40.6%41.4%48.4%49.5%57.7%52.2%55.6%65.0%69.2%76.1%94.3%12.9%12.7%13.0%16.5%14.3%20.1%15.5%13.5%32.9%28.3%37.8%38.7%45.4%46.4%53.7%47.8%52.9%61.9%66.4%72.5%93.4%11.1%13.4%10.6%15.0%13.7%18.0%14.4%14.2%30.3%26.4%35.0%34.4%42.8%43.3%51.0%44.4%47.1%59.5%63.9%70.3%92.7%8.9%8.8%8.4%10.6%9.5%12.7%10.3%10.6%23.3%20.0%26.5%27.5%34.2%34.6%41.8%35.0%38.1%40.5%54.7%62.5%90.2%7.4%8.0%7.2%8.1%8.0%9.3%8.5%8.7%20.0%17.0%23.2%23.7%29.8%30.6%36.9%30.8%33.6%36.1%45.3%57.9%88.0%5.9%5.8%5.2%6.7%5.7%8.1%6.7%6.6%15.4%13.1%18.1%18.6%23.8%24.1%30.1%23.9%27.5%29.7%37.5%42.1%84.4%1.0%1.1%1.0%1.3%1.2%1.6%1.2%1.3%3.3%2.8%4.2%4.1%5.5%5.8%7.6%5.7%6.6%7.3%9.8%12.0%15.6%

First Alternate

For every pair of candidates, this table shows the fraction of voters who ranked one candidate first ranked the other candidate second.

Second ChoiceFirst ChoiceLynette SweetTony KellyMalia CohenMarlene TranSteve MossTeresa DuqueDewitt M. LacyChris JacksonKristine EneaEric SmithJames M. CallowayDiane Wesley SmithGeoffrea MorrisStephen WeberAshley H RhodesRodney Hampton, Jr.Ed DonaldsonJackie NormanNyese JoshuaM.J. Marie FranklinEllsworth ''Ell'' JennisonWrite-inLynette SweetTony KellyMalia CohenMarlene TranSteve MossTeresa DuqueDewitt M. LacyChris JacksonKristine EneaEric SmithJames M. CallowayDiane Wesley SmithGeoffrea MorrisStephen WeberAshley H RhodesRodney Hampton, Jr.Ed DonaldsonJackie NormanNyese JoshuaM.J. Marie FranklinEllsworth ''Ell'' JennisonWrite-inExhausted Ballot3.7%14.9%2.0%8.2%1.0%8.2%7.4%2.3%2.1%3.2%3.8%1.6%1.4%0.9%2.4%2.4%2.0%0.5%0.5%0.2%0.2%31.2%4.9%4.4%1.9%15.7%0.5%34.3%8.0%4.0%3.8%0.8%0.6%0.6%1.0%0.2%0.5%0.6%0.3%1.6%0.3%0.3%0.2%15.4%14.7%4.2%2.8%5.8%1.5%8.7%10.4%2.5%6.7%2.2%4.4%2.3%0.9%1.5%1.4%0.9%1.3%0.7%0.2%0.6%0.1%26.0%2.4%4.9%2.9%3.2%44.1%1.6%4.6%1.8%0.5%2.9%0.7%0.9%0.9%0.6%0.3%0.4%0.3%0.4%0.6%0.3%0.0%25.5%10.0%18.4%8.0%3.4%2.8%6.5%6.1%5.8%4.3%1.7%1.0%1.0%2.4%0.5%1.2%1.0%0.5%0.7%0.7%0.8%0.1%23.4%1.7%0.8%3.3%48.4%4.2%1.5%2.6%1.1%0.8%0.8%0.3%0.7%0.6%0.3%0.9%0.1%0.2%1.0%1.5%0.3%0.1%28.7%7.8%7.8%30.5%1.8%7.5%0.5%8.7%3.3%5.3%1.3%1.4%1.9%0.5%0.2%1.2%1.3%0.8%0.7%0.8%0.2%0.1%16.6%8.3%17.7%10.4%6.6%6.8%2.2%9.8%2.2%3.0%2.7%2.0%1.1%1.2%0.8%1.3%2.0%1.1%0.3%0.2%0.3%0.2%19.8%7.5%12.1%6.6%4.4%12.5%2.6%8.8%6.1%6.3%2.2%1.5%1.8%4.6%0.9%1.3%1.5%1.3%0.9%0.7%0.7%0.2%15.4%2.7%20.5%17.9%1.6%10.0%0.7%10.9%7.1%3.1%1.8%1.8%2.2%1.3%0.9%0.7%1.8%0.7%0.2%0.7%0.0%0.0%13.4%7.4%3.8%7.2%5.0%4.8%2.4%6.5%6.7%3.1%1.4%6.0%3.1%2.9%2.4%3.6%1.9%2.6%2.4%2.4%1.4%0.0%22.8%15.0%1.8%8.5%2.5%3.8%1.3%7.0%7.5%3.3%1.5%7.0%0.3%1.3%4.5%1.0%0.5%4.0%1.5%1.0%1.8%0.3%24.8%10.8%1.5%14.1%1.8%3.0%2.4%3.9%3.0%2.1%0.6%3.6%4.5%0.3%2.1%4.8%3.0%3.3%1.5%1.2%0.3%0.3%31.8%3.9%7.1%8.0%3.2%10.3%2.6%4.8%3.2%6.8%1.3%3.2%4.8%0.0%2.6%2.6%1.9%1.0%1.0%0.6%2.6%0.0%28.6%5.4%3.1%14.2%8.5%1.5%0.4%1.9%3.5%5.0%1.2%8.1%9.6%0.4%4.6%3.1%0.4%3.8%1.5%0.4%1.2%0.0%22.3%8.4%1.7%5.9%2.5%2.5%2.1%4.2%6.3%2.1%2.5%4.2%3.8%6.8%3.8%3.4%5.5%2.5%3.8%1.7%2.1%0.0%24.1%18.3%1.0%10.4%1.0%5.4%2.5%8.9%3.5%2.5%1.5%2.5%2.0%1.5%2.5%0.5%8.4%3.0%0.0%1.0%0.5%0.0%23.3%10.2%1.6%10.8%0.5%3.8%1.1%3.2%8.1%2.2%2.7%1.6%7.0%2.7%1.6%5.4%4.8%0.5%2.7%0.5%0.5%0.0%28.5%5.2%12.6%4.4%6.7%1.5%3.7%6.7%8.1%2.2%0.0%2.2%8.9%5.2%1.5%1.5%5.9%2.2%0.0%1.5%3.0%0.0%17.0%7.4%3.7%6.2%8.6%7.4%4.9%3.7%4.9%3.7%2.5%9.9%0.0%3.7%1.2%1.2%4.9%0.0%2.5%7.4%4.9%0.0%11.1%4.4%8.8%2.9%4.4%2.9%2.9%4.4%8.8%5.9%4.4%5.9%1.5%0.0%5.9%2.9%2.9%0.0%2.9%8.8%5.9%0.0%13.2%17.6%0.0%5.9%0.0%0.0%0.0%11.8%0.0%0.0%0.0%5.9%0.0%0.0%0.0%0.0%0.0%0.0%0.0%0.0%0.0%0.0%58.8%

Final-round vote by First vote

For each candidate who was eliminated before the final round, this table shows which final-round candidate the eliminated candidate's first-round ballots went to.

Final Round ChoiceFirst ChoiceLynette SweetMarlene TranSteve MossTeresa DuqueDewitt M. LacyChris JacksonKristine EneaEric SmithJames M. CallowayDiane Wesley SmithGeoffrea MorrisStephen WeberAshley H RhodesRodney Hampton, Jr.Ed DonaldsonJackie NormanNyese JoshuaM.J. Marie FranklinEllsworth ''Ell'' JennisonWrite-inMalia CohenTony KellyExhausted Ballot23.8%5.7%70.5%6.1%10.5%83.4%13.3%26.7%60.0%8.1%5.7%86.2%36.9%13.2%49.9%17.0%23.7%59.3%12.3%19.3%68.4%24.1%29.5%46.4%11.0%7.0%82.0%15.8%3.8%80.5%18.9%2.4%78.7%10.9%10.6%78.5%21.5%7.3%71.2%11.0%4.2%84.8%17.3%2.5%80.2%16.7%3.8%79.6%8.9%17.0%74.1%8.6%8.6%82.7%8.8%17.6%73.5%5.9%0.0%94.1%

Honest Approval Set

Another voting system is Approval Voting, which involves indicating one or more candidates you approve of without ranking them. The candidate with the most voters who approve of them wins. It is impossible to know how voters would vote on an approval ballot based on their ranked ballot, but two reasonable assumptions we can narrow down the set of possibe approval ballots. With these possible approval ballots, we can determine which candidates would have had a chance of winning under an approval voting system.

The assumptions we make are:

  • Every voter who ranked at least one candidate would have voted for at least one candidate in an approval vote.
  • Every voter’s approval votes would be consistent with their ranked ballot, that is, they would not vote for a candidate unless they also voted for every candidate who appeared above that candidate on their ranked ballot.

The table below shows the maximum vote margin each candidate could have received (over the next best candidate) in an approval system, subject to these assumptions.

CandidateMost Favorable Scenario
Lynette SweetWins 4,308 to 2,246
Tony KellyWins 4,132 to 2,242
Malia CohenWins 4,584 to 2,269
Marlene TranWins 3,563 to 2,242
Steve MossWins 4,033 to 2,245
Teresa DuqueWins 2,888 to 2,242
Dewitt M. LacyWins 3,770 to 2,242
Chris JacksonWins 3,789 to 2,274
Kristine EneaLoses 2,242 to 1,466
Eric SmithLoses 2,429 to 1,831
James M. CallowayLoses 2,242 to 1,201
Diane Wesley SmithLoses 2,242 to 1,173
Geoffrea MorrisLoses 2,242 to 874
Stephen WeberLoses 2,242 to 852
Ashley H RhodesLoses 2,242 to 634
Rodney Hampton, Jr.Loses 2,242 to 840
Ed DonaldsonLoses 2,242 to 741
Jackie NormanLoses 2,242 to 666
Nyese JoshuaLoses 2,242 to 459
M.J. Marie FranklinLoses 2,242 to 381
Ellsworth ''Ell'' JennisonLoses 2,242 to 281
Write-inLoses 2,242 to 52

Meta

NameSan Francisco 2010 Municipal Election - District 10
Date2010-11-02
Total Ballots20,550
Input Formatus_ca_sfo
Tabulation Methodeager_irv
Normalized Ballot Dataus/ca/sfo/2010/11/d10/us_ca_sfo_2010_11_d10.normalized.csv.gz

Raw Input Data

File NameSHA-1
us/ca/sfo/2010/11/MasterLookup-D10.txtf6c5ccbe0515fdcdd55ee46c0d2421ed762af1af
us/ca/sfo/2010/11/BallotImage-D10.txt3c7c7b8545f15bbd12444f9e464f537cb7cd9901
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Created by Paul Butler. The content on this page may be reproduced freely under the terms of the CC BY license.