What Is a Shapefile and Why Do You Need One for Redistricting?

By EditorMay 14, 2026

If you have spent any time around redistricting software or GIS professionals, you have probably heard the term "shapefile" and possibly nodded along without knowing what it means. A shapefile is a digital file format that stores the geographic boundaries of a defined area as a map layer. Think of it as the outline of a jurisdiction, your city limits, your county boundaries, your voting precincts, your census tracts, all saved in a format that mapping software can read, display, and analyze. TIGER boundary files are shapefiles from the Census Bureau that are important for drawing legally compliant district maps.…

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Missouri State Supreme Court Hears Oral Argument in 3 Challenges to 2025 Congressional Map

By EditorMay 12, 2026

The Missouri Supreme Court heard oral arguments Tuesday morning in three consolidated challenges to the state's new congressional map, known as the Missouri First Map, which Gov. Mike Kehoe signed into law following a special legislative session in September 2025. The map, drawn as part of President Trump's broader mid-decade redistricting push to secure additional Republican congressional seats ahead of the 2026 midterms, splits parts of Kansas City into three districts and adds Republican-leaning areas to the district of Rep. Emanuel Cleaver, one of the state's two Democratic House members. The Republican-led legislature passed the map last fall, targeting one…

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With Election Clock Ticking, Virginia Democrats File Emergency SCOTUS Appeal

By EditorMay 11, 2026

Virginia Democrats on Monday asked the U.S. Supreme Court to revive the voter-approved redistricting amendment struck down last week by the Supreme Court of Virginia, escalating the fight over the state's congressional map to the nation's highest court. In an emergency application filed with Chief Justice John Roberts, attorneys representing House Speaker Don Scott, Senate Majority Leader Scott Surovell, Senate President Pro Tempore Louise Lucas, and the commonwealth of Virginia asked the court to pause the state ruling while the appeal moves forward. Democrats are asking the court to immediately freeze the Virginia ruling and keep the new congressional maps…

Virginiacaseupdates, lawindepth, mid-decade redistricting, policyindepth, Virginia

U.S. Supreme Court Clears Alabama to “Revert” to Previously Struck Down 2023 Congressional Map

By EditorMay 11, 2026

In a 6-3 decision on Monday, the Supreme Court lifted lower-court injunctions that had blocked Alabama's 2023 congressional maps and imposed court-drawn maps set to remain in place until after the 2030 Census. The unsigned majority order offered no explanation, instead vacating the lower court ruling and remanding the case back to the three-judge district court for reconsideration in light of Louisiana v. Callais. The decision opens a path for Republicans to pick up an additional U.S. House seat, as the 2023 map cuts two majority-Black congressional districts down to one, concentrating Black voters into the 7th Congressional District while…

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Tennessee Enacts New Congressional Map, Eliminating State’s Only Majority-Black District

By EditorMay 10, 2026

Last week's Supreme Court ruling in Louisiana v. Callais dramatically altered the legal landscape for redistricting across the South, and Tennessee wasted no time responding. In a 6-3 decision, the Court struck down Louisiana's majority-Black congressional district as an unconstitutional racial gerrymander, substantially narrowing the scope of Section 2 of the Voting Rights Act for challenging district maps. Critically, the Court raised the evidentiary bar for plaintiffs, requiring them to prove discriminatory intent tied to present-day conditions and to offer alternative maps that also satisfy a state's legitimate redistricting goals, making it significantly harder to bring successful Voting Rights Act…

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Virginia Supreme Court Strikes Down Democratic Redistricting Plan in McDougle v. Virginia

By EditorMay 09, 2026

The Supreme Court of Virginia on May 8th, struck down a voter-approved constitutional amendment that would have authorized Democrats to redraw the state's congressional map mid-decade, voiding the results of the April 21 special election in which Virginia voters had narrowly approved the measure. In a 4-3 decision in McDougle v. Virginia, the court ruled that the General Assembly violated procedural requirements under Article XII, Section 1 of the Virginia Constitution by advancing the amendment to the ballot, declaring that the constitutional violation "incurably taints the resulting referendum vote and nullifies its legal efficacy." The core procedural flaw, as the…

Virginiacaseupdates, lawindepth, mid-decade redistricting, Virginia

Supreme Court Rewrites the Rules for Minority Voting Rights in Louisiana v. Callais

By EditorMay 08, 2026

On April 29, the Supreme Court issued a landmark 6-3 ruling in Louisiana v. Callais that dramatically narrows how courts evaluate claims of racial vote dilution under Section 2 of the Voting Rights Act (VRA). The decision, written by Justice Alito, involves Louisiana's congressional map known as "SB8," which was drawn to include a second majority-Black district after a lower court found the state's earlier map likely violated the VRA. When Louisiana complied by drawing SB8, a separate group of plaintiffs challenged it as an unconstitutional racial gerrymander. The Supreme Court agreed, and in doing so, it reshaped the legal…

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What Just Happened? Callais Decision Triggers Mutliple Map Redraws

By EditorMay 07, 2026

The Supreme Court has struck down Louisiana’s 2024 congressional map in Louisiana v. Callais, ruling 6-3 that the state’s creation of a second majority-Black district was an unconstitutional racial gerrymander. The map had been drawn after lower courts found Louisiana’s 2022 plan likely violated Section 2 of the Voting Rights Act because it contained only one majority-Black district in a state where Black residents make up roughly one-third of the population. But the new 2024 map prompted a separate challenge from voters who argued that Louisiana had sorted voters by race in violation of the Equal Protection Clause. The Court…

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Virginia’s On Again, Off Again Redistricting Map Referendum

By EditorFeb 22, 2026

On Feb. 19, 2026, Chief Judge Jack Hurley of the Tazewell County Circuit Court issued a temporary restraining order (TRO) blocking state and local election officials from moving forward with an April 21 statewide referendum that would let voters decide whether the General Assembly may adopt a new, mid-decade congressional map. The order, sought by the Republican National Committee, the National Republican Congressional Committee, and two GOP members of Congress, is effective until March 18 and could derail the vote because early in-person voting is scheduled to begin March 6. Judge Hurley agreed with the plaintiffs that the referendum’s timing…

Virginiamid-decade redistricting, Virginia

Court Ordered CD11 Redraw in New York Sparks High-Stakes Appeals

By EditorFeb 22, 2026

Status update: Williams et al. v. Board of Elections of the State of New York is now in a fast-moving appellate phase, with the dispute also reaching the U.S. Supreme Court’s emergency docket. On Jan. 21, 2026, a state trial court ruled that New York’s 11th Congressional District (NY-11) violates the New York Constitution’s anti–vote dilution provision (Art. III, § 4(c)(1)) and directed the state’s Independent Redistricting Commission to produce a remedy on a short timetable. Republicans appealed, but an intermediate state appeals court has allowed the case to continue moving toward a redraw, while a sitting member of Congress…

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