Overview
- Cook Political Report updated its ratings on Sept. 24 and said the range of outcomes now puts Democrats as likely to net between one and five seats while needing a net gain of four to win control.
- The outlet shifted three races toward Democrats by moving Georgia from Lean Democrat to Likely Democrat, Kansas from Likely Republican to Lean Republican, and South Carolina from Solid Republican to Likely Republican.
- In Georgia, Sen. Jon Ossoff holds roughly $42 million in cash on hand versus about $2 million for Rep. Mike Collins, a gap Cook cited as making the race significantly harder for Republicans to contest.
- Cook pointed to candidate‑specific vulnerabilities driving competitiveness, including reporting on Sen. Roger Marshall’s billing and collections controversy in Kansas and worries among South Carolina Republicans about Sen. Darline Graham Nordone’s weak numbers and turnout.
- The report said national pressures — rising prices tied to the Iran war and tariffs among them — plus undecided and third‑party voters are shifting the map and are likely to make late advertising and turnout operations decisive.