Several 2026 Senate contests remain highly competitive less than three weeks before Election Day, driven by polling averages placing multiple races within or near a 5-point margin. Toss-up or near-toss-up seats in Iowa, Texas, Nebraska, and the Ohio special election show the narrowest projected spreads, while Maine, Alaska, Kansas, and Michigan feature single-digit leads that could tighten further with final turnout and advertising. Democratic candidates have posted gains in recent surveys across several Republican-leaning states, supported by strong recruitment and fundraising in key battlegrounds, while Republicans maintain advantages in others through heavy outside spending. Late-cycle developments such as debates, voter mobilization efforts, and any national shifts could alter margins in these races before ballots are cast on November 3.