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1 There are areas of commonality, or consensus, within American public opinion, including consensus on the legitimacy of the government, equality of opportunity, liberty, and democracy.
A typical margin of error â a measure of the accuracy of a public opinion poll â is about 3%. In a poll that says that 52% of the respondents favor Janet Smith for Mayor, somewhere between 49% (-3) and 55% (+3) of the voters actually do support her. You can see how predicting a close election can be very difficult. Given the challenges of accurate polling of public opinion, it is amazing that polls that follow the right steps almost always make the right predictions. They've come a long way since George Gallup helped his mother-in-law win her election in 1932.