Notably, however, the polls provide a much narrower range in their estimates of how many people disapprove of Biden -- all seven of those surveys put Biden's disapproval rating somewhere between 48% and 52%. Instead, a good chunk of the variation has to do with the share of Americans who say they aren't sure. Two of Biden's worst recent polls, the Quinnipiac and Grinnell surveys, both found 12% saying they're unsure about Biden's job performance, or declining to offer an opinion. Polls conducted using telephone interviews -- including the Quinnipiac, Grinnell and Gallup polls, generally don't read off "not sure" as a possible response to their questions, but their interviewees will sometimes volunteer it, anyway. Some pollsters push harder than others to prompt wavering respondents to share which of the options they're leaning toward.

Source: CNN October 29, 2021 21:12 UTC