Tuesday, 3. November 2026

🏛️ Politics ✦ AI

Democrats win the majority in the US Senate at the 2026 midterm elections (3 November 2026)

On 3 November 2026, 34 Senate seats are contested. Polymarket places the probability of Democrats flipping the Senate at approximately 44% (Republicans retain ~56%, $3.2M volume). Clearly distinct from the existing 'Democrats win the House' prediction (Polymarket ~83-86%); Senate and House races historically often decouple. Democrats benefit from anti-Trump fatigue but must defend comparatively more vulnerable seats. This prediction anchors to the Polymarket estimate of ~44% without significant deviation.

40%

Next Year · Predicted for 3. Nov 2026

🏛️ Politics ✦ AI

Democrats win the majority in the US Senate at the 2026 Midterm Elections (November 3, 2026) and become the Senate Majority Leader party

Metaculus assigns Republicans 58.9% probability of holding the most Senate seats – implying ≈41% for Democrats. Structural analysis: Republicans currently hold a 53-47 majority and must defend 22 of the 35 contested seats. Democrats need a net gain of four seats. The NYT recently upgraded Alaska from 'Lean Republican' to 'Tossup'. Democrats lead in North Carolina and Maine; Republicans hold narrow advantages in Iowa, Ohio, and Texas. Historical anti-Trump wave effect (the president's party typically loses seats in midterms) could boost chances. Headwind: the Senate map structurally favors Republicans in this specific cycle composition.

38%

Next Year · Predicted for 3. Nov 2026