When President Trump took office in 2017, he pursued a deregulatory agenda that exceeded even that of President Reagan. Environmental rules and policies were a major target of the Administration. The President deployed a mix of traditional tools, such as executive orders, guidance documents and policies, and rulemaking to suspend or reverse longstanding regulations and policies of the Environmental Protection Agency (EPA), the Department of the Interior, and other environmental agencies. The Administration also utilized the Congressional Review Act as it had not been used before and aggressively sought abeyances in litigation challenging disfavored rules and policies to advance its deregulatory agenda. In the short-term, its substantive deregulatory record was impressive