Several 2026 Senate contests produced final margins under or near five points after November 3 balloting, including Iowa, Kansas, Ohio, South Carolina, Louisiana, Florida, and Mississippi, where late provisional and mail ballots shifted leads. Democrats flipped multiple Republican-held seats in these tight races, with Mississippi decided by roughly half a point following extended counting and Alaska remaining among the closest unresolved contests. Ongoing certification timelines in a handful of states continue to determine exact margins, directly influencing which races meet the five-percent threshold reflected in trader consensus.