
The drawing of district boundaries, also known as redistricting, is a complex process that varies across different states in the US. While the federal constitution imposes few limitations on redistricting bodies, it does stipulate certain requirements, such as equal population distribution and the prohibition of racial discrimination. The US Constitution also grants states and their legislatures the authority to determine the times, places, and manner of congressional elections, allowing for state-specific rules and constraints. These rules can include considerations such as contiguity, minority voting rights, and communities of interest, which aim to ensure fair representation for all citizens. The process of redistricting is typically overseen by state legislatures, but some states employ advisory commissions or politician commissions to assist in or lead the process.
| Characteristics | Values |
|---|---|
| Population | Equal population across districts |
| Voting Rights | Protection of minority voting rights |
| Contiguity | 45 states require state legislative districts to be contiguous |
| Redistricting Bodies | Limited federal constraints, with states and legislatures having primary authority |
| Communities of Interest | 15 states consider keeping communities of interest whole when drawing state legislative districts |
| Compactness | Required for legislative districts in 32 states and congressional districts in 17 states |
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What You'll Learn

States have primary authority in determining the times, places, and manner of elections
The Elections Clause, or Article I, Section 4, Clause 1 of the United States Constitution, grants states and their legislatures primary authority in determining the "times, places, and manner" of holding congressional elections. This means that each state has the power to establish its own procedures for conducting elections, including setting the dates, designating polling places, and determining the specific rules and processes that will govern the election.
However, it is important to note that this authority is not absolute. While states play a fundamental role in administering elections, the Constitution also grants Congress the power to "make or alter" state regulations regarding elections. This means that Congress can step in and establish uniform rules for federal elections if it deems it necessary. The Elections Clause thus creates a balance between state authority and federal oversight in the administration of elections.
The specific process of redistricting, or drawing district lines, is a key aspect of election administration. While the federal constitution imposes few limitations on redistricting, states often have their own rules and constraints. These can include requirements for contiguity, compactness, and respect for minority voting rights. The Supreme Court has also played a role in shaping redistricting practices, ruling on issues such as partisan gerrymandering and racial considerations in district mapping.
In practice, the process of redistricting varies from state to state. Some states give this power to their state legislature, while others have established independent redistricting commissions to handle the task. The specific criteria for drawing district lines can also differ between states, with some states providing explicit priority orders for various criteria, while others leave it to the entity drawing the lines to resolve conflicts between different criteria.
Overall, while states have primary authority in determining the "times, places, and manner" of elections, the complex interplay between state and federal powers, as well as legal challenges, can significantly shape the outcome of the redistricting process and the administration of elections more broadly.
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Districts must represent equal population
The United States Constitution outlines specific criteria for district formation, with two major requirements: equal population and the prohibition of racial discrimination. This concept, often referred to as "One Person, One Vote", underscores the need for districts to have roughly equal populations. This requirement stems from the Supreme Court's decision in Wesberry v. Sanders, where the Court affirmed that each person's vote in a congressional election should carry roughly equal weight.
The Constitution requires that congressional representatives be apportioned among the states based on population size. Each state is allocated a portion of the 435 seats in the House of Representatives relative to its population. Consequently, states with larger populations gain more seats, while those with decreasing populations may lose seats. This mechanism ensures that congressional districts strive for equal population distribution.
To achieve this equality, districts must be drawn with consideration for population data. Census data plays a crucial role in this process, providing the basis for establishing congressional districts. Every ten years, following the census, each state with multiple congressional seats redraws its district boundaries to reflect population changes. This process aims to maintain equality among district populations, ensuring that each representative serves a similar number of constituents.
The equal population requirement is stringent, and any deviation from the ideal population distribution across districts must be justified by a consistent state policy. Even minor deviations of 1% from the largest to the smallest district can be deemed unconstitutional. This standard underscores the importance of population equality in district formation.
While the federal constitution provides guidelines, state legislatures typically have primary control over the redistricting process. They are responsible for ensuring that district lines comply with federal requirements, including equal population distribution and the absence of racial discrimination. State constitutions and statutes may also impose additional rules, such as contiguity requirements, further shaping how districts are drawn.
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Districts must not racially discriminate
The United States Constitution is silent on the issue of state legislative redistricting. However, the federal constitution puts few practical limits on redistricting bodies, and various rules limit where district lines may or may not be drawn. According to Article I, Section 4 of the US Constitution, the states and their legislatures have primary authority in determining the "times, places, and manner" of congressional elections. Congress may also pass laws regulating these elections. Article I, Section 2 stipulates that congressional representatives be apportioned to the states based on population. Each state is allotted a portion of the 435 seats in the House of Representatives relative to its population size.
The 14th Amendment prohibits the improper use of race in redistricting. Racial gerrymandering, which aims to maximize or minimize the impact of certain racial groups, is a violation of constitutional rights. The Supreme Court has held that racial gerrymandering is unconstitutional and upheld decisions against redistricting that is purposely devised based on race. Racial gerrymandering can be created without considering party lines, but it often redraws districts in ways that limit minority voters to a smaller number of districts.
The Supreme Court first recognized "affirmative racial gerrymandering" claims in Shaw v. Reno (Shaw I) in 1993, holding that redistricting legislation that is race-neutral on its face cannot be understood as anything other than an effort to separate voters into different districts based on race. The Court reasoned that these claims were valid because relying on race in redistricting reinforces racial stereotypes and threatens to undermine representative democracy.
In the case of Shelby County v. Holder, the Supreme Court's decision impacted the voting power of minorities. The Court has also stated that federal courts cannot hear claims of undue partisanship in redistricting because there is no clear standard for determining how much is "too much." However, state law increasingly restricts undue partisanship, and the constitutions or statutes of 19 states speak to the issue for state legislative districts.
To avoid racial discrimination in redistricting, it is essential to ensure that maps are drawn fairly and do not disenfranchise minority voters. This includes considering factors such as population equality and minority voting rights, which have federal backing. Additionally, state constitutions and statutes may provide additional rules for drawing district lines.
In conclusion, districts must be drawn without racial discrimination by ensuring fair representation for all, complying with federal and state laws, and avoiding the improper use of race as a predominant factor in redistricting.
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Districts must be contiguous
The United States Constitution does not provide detailed instructions on how districts should be drawn. However, it does outline some key principles that must be followed. One of these principles is that districts must be contiguous.
Contiguity is a fundamental concept in redistricting. It refers to the idea that a district should be a unified geographical area without any enclaves or exclaves. In other words, you should be able to travel from any point within a district to any other point without crossing the boundary of another district. This requirement ensures that districts are physically cohesive and prevents the creation of gerrymandered districts with bizarre or irregular shapes.
At the federal level, the Constitution does not explicitly mandate contiguity for congressional districts. However, it does grant state legislatures the authority to determine the "times, places, and manner" of congressional elections, which includes the drawing of district lines. As a result, state constitutions or statutes play a crucial role in defining the rules for district mapping, including the requirement for contiguous districts.
A significant number of states have adopted contiguity as a rule for drawing district boundaries. According to one source, 45 states require at least one chamber's state legislative districts to be contiguous. Additionally, 18 states have made similar declarations for their congressional districts. While a smaller number of states have express legal constraints on congressional districting, it is common practice for congressional districts to be drawn contiguously.
The requirement for contiguous districts helps ensure compactness and avoids the division of communities of interest. By keeping communities intact, districts can better represent the common political, cultural, racial, ethnic, social, and economic interests of their residents. This promotes fairer representation and helps prevent partisan gerrymandering.
In summary, the principle of contiguity plays a crucial role in redistricting by ensuring that districts are geographically cohesive and aligned with communities of interest. While the specific rules vary from state to state, the requirement for contiguous districts is widely recognized as an important factor in creating fair and representative electoral maps.
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States can add their own constraints
While the United States Constitution outlines some requirements for how districts should be drawn, states have the primary authority to determine the "times, places, and manner" of congressional elections. This means that states can add their own constraints when it comes to drawing districts.
State constitutions and statutes may provide additional rules for drawing district lines. For example, contiguity is a common rule imposed by states, with 45 states requiring at least one chamber's state legislative districts to be contiguous. States may also consider keeping "communities of interest" whole when drawing state legislative districts, ensuring that districts represent common political, cultural, racial, ethnic, social, and economic interests.
In some states, advisory commissions are appointed to help advise the legislature on where district lines should be drawn. These commissions can vary in their structure and independence, and they may be created by statute or written into the state constitution.
Additionally, state law can restrict undue partisanship in the redistricting process. The constitutions or statutes of several states now speak to the issue of partisan outcomes in state legislative districts.
The specific constraints imposed by states can vary, and they may be listed in priority order or presented without express priorities, leaving the entity drawing the lines to resolve any conflicts that arise.
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Frequently asked questions
The US Constitution has two major requirements for drawing districts: equal population and the prohibition of racial discrimination. This is often referred to as the "One Person, One Vote" doctrine.
Different entities are responsible for drawing district lines in different states. In most states, the state legislature has primary control over the redistricting process for both state and congressional districts. Some states, such as Iowa, Maine, Utah, and Vermont, appoint advisory commissions to help advise the legislature on where the district lines should be drawn.
Yes, various rules and constraints limit how district lines can be drawn. While the federal constitution puts few limits on redistricting bodies, individual districts must comply with certain federal constitutional and statutory requirements. States may also have their own additional rules and constraints for drawing district lines.
One common constraint is contiguity, which requires that all portions of a district are physically adjacent. Another constraint is the requirement for "communities of interest", which aims to keep geographical areas with common political interests together when drawing district lines.

























