**Missouri voters face Proposition A, a veto referendum on House Bill 1 (the 2025 congressional map) on the November 3, 2026 ballot.** A "yes" vote would uphold the Republican-drawn boundaries intended to shift the state toward a 7-1 GOP advantage by splitting Kansas City across three districts; a "no" vote would reject it and retain the 2022 map used in recent elections. The Missouri Supreme Court placed the measure on the ballot after litigation, ruling that the referendum process applies and suspending HB 1 for the 2026 cycle. Trader consensus favoring rejection (No at 74.5%) reflects several factors. Opposition group People Not Politicians gathered over 305,000 signatures, triggering the referendum, while spending reports show roughly $7 million raised against the map compared with about $3 million in support. Public polling from August showed a near-tie with high undecideds (35% yes, 32% no, 33% unsure), but the measure is widely framed as a mid-decade gerrymander advanced at the urging of President Trump and signed by Gov. Mike Kehoe. Backlash against altering districts outside the normal post-census cycle, combined with voter confusion over ballot language and the status-quo advantage for the existing map, has supported the view that rejection is the more likely outcome. Early voting begins October 20, with no later polls or major shifts reported that would clearly reverse this positioning.