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Abstract Climate change policymaking has stalled at the federal level in the United States, especially since Donald Trump’s election as president. Concurrently, extreme weather, rising sea levels, and other climatic effects have increased the salience of climate change in the mass public and among elected officials. In response, legislators in state governments increasingly introduce and adopt policies associated with climate change. In this article, we evaluate the state of climate change policymaking in state legislatures, with a focus on overall trends in climate mitigation and adaptation innovation and cases of policy retrenchment. We document an increased level of climate legislation introduced in U.S. states since President Trump’s election, particularly in states under Democratic Party control. We evaluate patterns of introduced legislation across the states between 2011 and 2019 and consider the factors associated with bill sponsorship. Our results demonstrate the increased partisan nature of climate change policymaking in U.S. states.
Bromley‐Trujillo et al. (Wed,) studied this question.