Book excerpt: Political responses to climate change are shaped by beliefs and ideas. How does discourse on climate action and its contestation affect policy-making? Addressing this question, the book compares EU and US policy-making since the Paris Agreement and its framing by key political institutions. The empirical part analyses the structure, linkages and contestation of frames to evaluate the contrasting spaces of climate politics in both systems. As the first direct comparison of EU and US climate governance since the Paris Agreement, the book advances current research on the politics of climate change, the politicization of multi-level governance and the role of discourse for policy change.