Whose secret service code name was rover because of the way he or she roamed the country checking projects and comforting people?

The secret service code name "Rover" belonged to President Franklin D. Roosevelt. He earned this nickname due to his frequent travels across the country, where he would visit various projects and engage with the public, providing comfort and support during challenging times like the Great Depression. His hands-on approach and commitment to understanding the needs of citizens exemplified his leadership style.