| [1] Economist/YouGov | Nonpartisan polling. The Economist’s editorial outlook is market-liberal. | High for the question asked. Original October crosstabs, Q49. The Democratic subgroup had 502 unweighted respondents. |
| [2] Economist/YouGov | Same pollster and sponsor. | High for the question asked. Original November crosstabs, Q77D. The poll release reports party favorability and survey methods. |
| [3] Economist/YouGov | Same pollster and sponsor. | High for its February and March 2025 readings. The pollster reports its own trend. |
| [4] RedBox Research | Polling arm of the progressive super PAC A Fight Worth Having, which advocates leadership change. | Limited for national claims. It publishes the question and race-level results. The pooled figures cover selected races, and its sponsor has a stake in the issue. |
| [5] Quinnipiac University | Independent, nonpartisan academic poll. | High for the question asked. Original probability-based national survey with published wording and method. |
| [6] Associated Press | Independent wire service. No party affiliation. | High for chamber control. Its race calls use reported returns and election data. |
| [7] AP Voter Poll | Nonpartisan voter survey. | High for reported voter views. It surveyed roughly 100,000 voters. The design cannot isolate any leader’s causal effect. |
| [8] Decision Desk HQ | Independent election data provider. No party affiliation. | Primary source for its own forecast. Percentages are model estimates. |
[9] Reuters recruitment [10] Reuters race call | Independent wire service. No party affiliation. | High for documented recruitment and the reported race projection. Assessments of campaign strategy include accounts from interested participants. |
| [11] AP campaign report | Independent wire service. No party affiliation. | High for the documented campaign appearance and reported travel. |