What polls do and don’t tell us about the 2026 midterms

Key Points:

• Polls provide an imprecise snapshot of public opinion and are not always reliable predictors in tight races, but they do reveal broad trends such as President Trump's low approval ratings and widespread voter desire for change.
• Democrats hold a consistent and significant lead on the national generic ballot, suggesting an overall advantage, though the exact extent and impact on individual races remain uncertain.
• A major challenge for pollsters this year is the large enthusiasm gap, with Democrats showing much higher motivation to vote than Republicans, which may skew survey responses and complicate accurate turnout predictions.
• Differential nonresponse, where certain voter groups are less likely to participate in polls, poses a risk of misrepresenting the electorate despite weighting adjustments, especially if less enthusiastic Republicans are underrepresented.
• Some Republican voters remain undecided or unwilling to support their party’s candidates in key states, leaving room for late shifts in voter behavior that could tighten races or alter outcomes, while historical polling errors have sometimes underestimated Republican support.