This chart, from our report Politics & Global Warming, Spring 2016, shows that, as a 2016 election issue, Democrats place a much higher priority on global warming than do Republicans.
Leiserowitz, A., Maibach, E., Roser-Renouf, C., Feinberg, G., & Rosenthal, S. (2016). Politics and global warming, Spring 2016. Yale University and George Mason University. New Haven, CT: Yale Program on Climate Change Communication.