Gallup Analytics provides trends in public opinion polling, using Gallup US Daily Poll questions 2008-2018 and Gallup World Poll questions 2006-2018. Output formats include tables for time-series trends, charts and scatterplots, and maps for individual poll question responses.
US Daily Poll geographies are: U.S., States, and Metropolitan Statistical Areas.
Gallup recommends using Gallup Analytics to identify questions and variables from the U.S. Daily Poll.
World Poll geographies are: Countries.
Questions in the World Poll vary by year and country. Gallup has a tool for identifying questions and when they were asked in a country.