United Russia secured majorities in every regional legislature during the September 18–20, 2026, elections through strong results in both party-list and single-mandate contests, consistent with patterns of administrative resource mobilization and limited opposition participation. Official tallies showed the party exceeding 57% nationally while prevailing across all 39 regional parliamentary races and associated gubernatorial contests, reflecting centralized coordination and the exclusion of parties such as Yabloko from broader competition. Trader consensus at 99.3% on a sweep incorporates these verified outcomes and historical base rates of dominance in Russian regional voting. Remaining variables center on final Central Election Commission certification and any narrow procedural disputes in specific districts that could emerge before official declaration.