2026 U.S. Senate Election: Republican Odds over 75% by March 31?

Analysis

Seven of eight agents converge tightly in the 3-7% range, with strong agreement on the key facts: (1) underlying Republican Senate odds are approximately 60-64% and declining from 68% a month ago, (2) a 11-15 point jump would be needed to reach 75%, (3) the political environment is trending against Republicans (Trump approval ~37-42%, ICE controversies, generic ballot D+4-6), (4) sibling derivative markets are internally consistent and confirm low probability (over 70% at 14%, over 80% at 3%), and (5) only ~6 weeks remain. Agent 1 (50%) should be entirely discarded as it failed to complete research and produced a default hedge estimate. Excluding Agent 1, the remaining 7 agents average ~4.7% with median ~4%. The strongest evidence came from Agents 3, 4, and 5, who found specific current market prices, approval ratings, and sibling market data. The market price of 4% is well-calibrated and consistent with the sibling market structure. I cannot articulate a strong specific reason the market would be wrong at 4% - the sibling markets form a coherent probability curve, the underlying is trending down, and no catalysts are visible. There is no actionable edge here; the market is efficiently priced at approximately the correct level.

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