His work focuses on the intersection of organized interests, especially business, labor, and wealthy donors, and public policy. His first book, "Politics at Work: How Companies Turn their Workers into Lobbyists" (2018, Oxford University Press), examines how businesses are increasingly recruiting their workers into politics to change elections and public policy. His next book, "State Capture: How Conservative Activists, Big Businesses, and Wealthy Donors Reshaped the American States – and the Nation" (Oxford University Press), examines cross-state networks of private-sector companies, donors, and activists who have pushed for right-leaning legislation across the states and how the political left has responded.