This guide provides information for in-house counsel, human resource professionals, and private practitioners about developments relating to diversity, equity, and inclusion (DEI) in the United States. It explains what DEI is, outlines key elements of DEI frameworks, and provides information about the recent changes to DEI made by President Trump. The guide also focuses on DEI matters relevant to boards of directors, including board composition, the role of the board in overseeing DEI initiatives, and reporting and disclosure considerations.