Idaho's solidly Republican electorate and Jim Risch's long incumbency underpin the market's strong consensus for his reelection, reinforced by his comfortable primary win and the July withdrawal of the Democratic nominee that left independent Todd Achilles as the main challenger. State fundamentals, including consistent GOP margins in recent federal contests, have kept most forecasts rating the race as safe or solid Republican despite Achilles raising substantial funds and one recent poll showing him ahead. Traders appear to discount outlier surveys in favor of structural advantages and historical patterns. Late developments such as a major scandal, sharp national partisan shift, or sustained polling movement toward Achilles could still alter the outcome before November.