Public opinion estimates by political party are produced using a statistical model based on national survey data gathered between 2008 and 2016 by the Yale Program on Climate Change Communication and the George Mason Center for Climate Change Communication. The model combines survey data with voter registration statistics at the state and district level. Note that party registration data is available for 32 states; party registration is imputed in the remaining states, as indicated in the map above.
To cite these data, and for more details, please refer to: Mildenberger, M., Marlon, J.R., Howe, P.D., and Leiserowitz, A. (2015) "The spatial distribution of Republican and Democratic climate opinions at state and local scales," Climatic Change. DOI: 10.1007/s10584-017-2103-0
For additional details see methods statement and Howe, P., Mildenberger, M., Marlon, J.R., and Leiserowitz, A., “Geographic variation in opinions on climate change at state and local scales in the USA,” Nature Climate Change. DOI: 10.1038/nclimate2583.
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This research and website are funded by the Skoll Global Threats Fund, the Energy Foundation, the 11th Hour Project, the Grantham Foundation for the Protection of the Environment, and the MacArthur Foundation.