In gerrymandering, districts are drawn to concentrate opposition voters into a few districts while securing small majorities in the remaining districts

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Proportional representation allows political parties to receive legislative seats in proportion to their total share of the vote across multi-member districts

A dummy-mander occurs when a party creates narrow majorities across districts that subsequently collapse into seat losses during an opposing wave election

The political term gerrymander originated from Massachusetts Governor Elbridge Gerry and a district map resembling a salamander

Gerrymandering requires single-member plurality voting, geographic district boundaries, and partisan authority over map drawing

The United States Supreme Court held that federal courts do not possess jurisdiction to adjudicate claims of partisan gerrymandering

Partisan gerrymandering in the United States House of Representatives distorts the translation of public sentiment into legislative lawmaking majorities

Republicans won only one congressional district among all the seats they altered during their mid-decade redistricting effort prior to the 2026 midterms

A redrawn South Texas congressional district extending from Austin to the Mexico border had a Latino population of approximately 75 to 80 percent

A South Texas congressional district previously won by Donald Trump by 17 points flipped to Democratic control in the 2026 midterm elections

Maryland voters approved a ballot measure granting the state broader authority to redraw congressional districts

In 15 United States House districts redrawn by Republicans prior to the 2026 midterms, Democrats won 11 seats while Republicans won one seat

White House political advisors James Blair and Tony Fabrizio prioritized state congressional redistricting as the primary strategy for the 2026 midterm elections

National Republican political strategist James Blair formulated the Republican Party's mid-decade congressional redistricting strategy

Republican Representative Lauren Boebert changed congressional districts in Colorado ahead of the 2026 election

Republicans lost every border congressional district in South Texas in the 2026 midterms despite redrawing the districts to capitalize on Latino male support

The Republican mid-decade redistricting plan in Texas relied on anticipated electoral gains among Hispanic voters

Following the Supreme Court decision in Louisiana v. Callais, Tennessee lawmakers redistricted Memphis across three separate congressional districts

The Cook Political Report assessed that roughly two-thirds of the congressional districts redrawn to favor Republicans after 2024 became competitive toss-up races

Following the 2024 election, Republican-led state legislatures redrew congressional district lines based on Donald Trump's 2024 electoral base

State legislatures in Florida and Texas executed major congressional redistricting pushes following the 2024 election