The dispersion of probabilities across the 310–354 seat ranges for United Russia in the September 2026 State Duma election reflects uncertainty over the effectiveness of administrative mobilization, regional turnout targets, and opposition performance in both party-list and single-member district voting. Recent polling from agencies such as FOM and VTsIOM places the ruling party’s support in the low-to-mid 30s percent range, well below its official 2021 result, prompting traders to weigh scenarios where Kremlin efforts secure a constitutional majority above 300 seats against risks of modest erosion. Key differentiators among leading outcomes include the scale of managed stability measures and whether smaller parties clear the five-percent threshold to fragment the remaining vote. Scheduled regional elections and candidate vetting processes over the coming months could consolidate or shift sentiment toward one band as these variables clarify.