Redistricting Workshop, Texas Assoc of Black City Council Members[3] Feb11, 2011-1
Transcript of Redistricting Workshop, Texas Assoc of Black City Council Members[3] Feb11, 2011-1
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2 01 1 C I T Y C O U N C I L D I S T R I C T S
P R E P A R E D F O R T H E T E X A S A S S O C I A T O N O F B L A C K C I T Y C O U N C I L M E M B E R S ( T A B C C M )
Q U A R T E R L Y B O A R D , M E M B E R S H I P , A N D W O R K S H O P
D R . K A R E N C A L L A G H A N
A S S O C I A T E P R O F E S S O R O F P O L I T I C A L S C I E N C E
T E X A S S O U T H E R N U N I V E R S I T Y
D R . M I C H A E L O . A D A M S
P R O F E S S O R A N D D I R E C T O R O F M P A / E - M P A P R O G R A M
T E X A S S O U T H E R N U N I V E R S I T Y
Redistricting
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Redistricting
Once assurances are received that everyone was
if the Census shows that districts have unequalpopulation, cities must redraw existing councildistrict lines.
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Redistricting Principles
Use geographic boundaries as districtboundaries
Maintain communities of interest
Follow existing voter precinct lines
Base new plan on existing district boundaries
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Create districts of relatively equalpopulation size
That are compact and contiguous
City council members must remain in theirdistrict
Avoid retrogressionRedistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Houston City Council Districts
Source: Map made by Callaghan and Adams with GIS software and ESRI files from the City of Houston Planning Deptartment
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Houston Voter Precinct Lines
Source: Map made by Callaghan and Adams with GIS software and ESRI files from the Caliber Corporation
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Voter Precinct and Council District Lines Overlap
H
Source: Map made by Callaghan and Adams with GIS software and ESRI files from the Caliber Corp . and City of Houston, Planning Dept.
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Equal Population
10% Rule: Population difference between largest andsmallest district may not be more than approximately
10% of the average district population
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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District Population DeviationA 219,048 0.7%
B 205,892 -5.3%
C 226,279 4.0%
D 221,970 2.1%
E 219,802 1.1%
F 225,139 3.5%
G 223643 2.8%
H 209,264 -3.8%
I 206,436 -5.1%
Total Population: 1,957,473 (est. 2009)
Ideal Population (Average): 217,497
Average deviation: 3.2%
Calculating District Population Scores
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Compactness and Contiguity
Compactness
A measure of how tightly packed a district is
ContiguityA district is contiguous if one can reach any other part
without crossing a district boundary
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Contiguous
Perfectly CompactNot Compact
Not Contiguous
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Assessing District Jaggedness
Supreme Court has relied on various measures
For example:
Pildes-Niemi Measure
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
Adopted City Council Districts Redistricting map
retrieved 2/9/2011 from
http://dallascityhall.com/government/council/adopt
ed_map.html
Dallas City CouncilDistricts
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Retrogression
voting strength
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Districting principles that advance a particular planmust be those that actually guided the constructionof the plan.
Districting principles must be applied consistentlyacross districts.
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Packing
Putting as many people with the same characteristic into asfew districts as possible.
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Cracking
Splitting groups of people with the samecharacteristics into more than one district.
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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City A
Democrats
Republicans
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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City A
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
Democrat Majority Districts 3
Republican Majority Districts 1
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What to Consider During the Redistricting Process
Current population demographics (race, income, age,education, employment, home ownership)
Population projections: What will the districtdemographics be in 2020?
essential for legal enforcement
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Mapping Software
ArcGIS
MapInfo
Maptitude
Public Domain
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Team
Attorneys
GIS Mapping Specialists
Statisticians
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Analysis
Shifting boundary lines
Current and projected voting patterns of councildistrict
Current demographics analysis and projections Analysis of the impact surrounding electoral districts
have on city council voting patterns
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Recommendation
Talk to the People in the Justice Department
Give Your Redistricting Plan to City Planners
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Bio: Dr. Michael O. Adams
- Professor of Political Science, Texas Southern University, Director of MPA andeMPA Programs
- Author of six books covering the fields of American Government, PublicAdministration and Public Policy; and more than twenty five peer reviewedarticles in scholarly journals
- Published articles on racial minority vote dilution in at-large city councildistricting plans
- 2009 Barbara Jordan-Mickey Leland International Service Award
- 2009 Korean Fellowship Award, Seoul Korea
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2008 Quiester Craig Teaching Award
- 2008 Defense of Democracy Fellowship, Tel Aviv University, Israel
- China
- Ph.D in Political Science, The Atlanta University. Fields: Urban Politics andMinority Political Participation and Public Administration
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Bio: Dr. Karen Callaghan
Associate Professor, Political Science, Former Director, Barbara Jordan-MickeyLeland School of Public Affairs Survey Center, Texas Southern University
Visiting Professor, Vanderbilt University, Postdoctoral Fellow, Rice University
Published author in several prestigious journals and presses
Probability models of minority vote dilution in Boston
Former Director, Quantitative Methods, Public Policy Ph.D. Program,University of Massachusetts, Boston
Goldsmith Research Award, Harvard University
National Science Foundation Doctoral Dissertation Award
Barbara Jordan-Mickey Leland Scholar Award
Recently served as Sr. Research Scientist, United States Defense Departmentcontractor in Afghanistan. Survey research and GIS mapping
Ph.D. in Political Science New York University at Stony Brook. Fields:Statistical Methodology and Political Psychology/Behavior
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University
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Acknowledgements
Jay Ayier, J.D., Esquire Attorney
Subria L. LappsGraduate Research Assistant
Texas Southern University
Eboni M. BarnesGraduate Research Assistant
Texas Southern University
Redistricting: 2011 City Council Districts. Michael Adams, PhD, Karen Callaghan, PhD, Texas Southern University