Context:

Despite favorable polling for Democrats in some races, a CNN data analyst warns the midterms may swing against them, arguing past poll performance in key states undermines confidence. He notes Republicans outperformed September polls in Iowa, Ohio, and Michigan in recent cycles, suggesting a similar gap could persist. The discussion ties national expectations to state contests, including Michigan, Ohio, and Iowa, where recent polls show Democratic leads that may not hold. Historical comparisons to 2018 and other cycles are used to caution that poll leads have not translated into votes. The bottom line: a strong chance exists that Republicans could retain the Senate unless a shift occurs.

Dive Deeper:

• CNN chief data analyst Harry Enten argues that even with seemingly favorable Democratic polling in some midterm races, there is a real risk the GOP will retain the Senate based on historical deviations from September poll leads in key states.

• In Michigan, a Marist poll shows Abdul El-Sayed (D) up 51% to 44% over Mike Rogers (R), while Ohio’s Senate race shows Sherrod Brown leading Jon Husted 47%-44% per USA Today/Suffolk; Iowa’s Fox News poll has Democrat Josh Turek ahead of Ashley Hinson by two points.

• Enten emphasizes that in prior cycles (2018, 2020, 2024), Republicans often outperformed September polls by several points in Iowa, Ohio, and Michigan, suggesting current leads could erode once votes are cast.

• He notes that the historical pattern resembles lessons from Trump-era midterms, where ballot outcomes diverged from September polling expectations, implying caution for Democrats despite early leads.

• The analyst concludes that if Republicans maintain a multi-point edge over September expectations in these states, the Senate outcome would most likely favor the GOP, casting doubt on Democratic expectations for a final victory.