Kalshi与Polymarket同步押注民主党中期选举优势两平台对2026年中期选举的定价趋于一致:民主党夺众议院约92%、夺参议院约60%。众议院盘口接近高位,但参议院、州级竞选及低概率长尾仍可能大幅波动;现有材料未提供新的赔率、成交量或时间序列。Sources (2)Kalshi declares Biggs a long shot as Arizona polls show mixed marginscronkitenews.azpbs.orgBrazil, calibrated prediction markets, and near-coin-flip electionssubstack.comUpdated Oct 1, 2026