Projected Delegation
6 R - 2 D
8 Total MO Congressional Seats
Efficiency Gap (Partisan Bias)
+13.4% R
Presumptive Gerrymander (>8%)
Mean-Median Partisan Skew
+6.8% R
Significant Asymmetry
Population Balance (± %)
±1.4%
Meets Constitutional Target
Missouri 64-Precinct Legislative Grid Matrix (8 Congressional Districts)
Dem Lean GOP Lean Toss-up | Hold left mouse button & hover to paint
District-by-District Legal & Partisan Breakdown Target: ~96,000 voters per district
District Geographic Anchor Voters GOP Share Dem Share Wasted (R) Wasted (D) Winner Compactness
Legal Context: The Purcell Principle, Electoral Chaos, and Partisan Gerrymandering Metrics

The Purcell Principle Doctrine

Established in Purcell v. Gonzalez (2006) and reinforced in cases like Merrill v. Milligan and Missouri emergency docket appeals, the Purcell Principle instructs federal courts not to alter election rules or redrawn congressional maps in the period immediately preceding an election. Lower courts must weigh whether injunctive relief would confuse voters, disrupt state election machinery, prevent military ballot dissemination, or incentivize electoral chaos.

The Partisan Efficiency Gap (EG)

Formulated by Nicholas Stephanopoulos and Eric McGhee, the Efficiency Gap calculates the difference in "wasted votes" between two parties divided by the total votes cast. Wasted votes include both votes cast for a losing candidate (cracking) and surplus votes cast above 50% for a winning candidate (packing). In legal scrutiny, an efficiency gap exceeding 7-8% over multiple election cycles indicates an enduring partisan advantage.

One Person, One Vote & Compactness

Under Article I, Section 2 and Wesberry v. Sanders, congressional districts within a state must achieve strict population parity (near zero absolute deviation without compelling justification). Concurrently, state constitutions and statutory guidelines frequently mandate geographic contiguity and compactness (measured by tests like the Polsby-Popper perimeter ratio) to prevent unnatural gerrymandered corridors.

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