Climate policy debates are increasingly fraught as various interests in society mobilize in support and opposition to climate actions. This has made it difficult to reach political consensus. In an effort to sharpen the analytical focus of elusive climate politics and policymaking, we will discuss a growing body of research on obstruction and opposition to climate policy. The Roundtable will explore the agents and structural conditions that appear to stand in the way of ambitious mitigation and adaptation policies. It will focus on: the networks of state and non-state actors involved in efforts to slow or block climate action; critical conflicts that go beyond fossil fuel extraction; and the role of politics in scientific bodies, such as the Intergovernmental Panel on Climate Change. The Roundtable will address the following questions: How and why do actors oppose climate policy? How can we distinguish legitimate concerns and narrow interest positions? When does opposition to climate policy turn into obstruction? How does climate obstruction limit policy options and perspectives? And how can stakeholder research contribute to increase transparency and policy options?