PPAG (Princeton Public Affairs Group) | 1,608 followers on LinkedIn. New Jersey's Best-In-Class public affairs firm, achieving success for our clients for over thirty-eight years. | Princeton Public Affairs Group (PPAG) is the largest state lobbying firm in the country. Founded in 1987, the firm is amongst one of the most effective and well-respected firms in New Jersey. For over thirty years, Princeton Public Affairs Group has maintained one of the largest and most diverse state lobbying firms in the country.