Final answer:
Franklin D. Roosevelt implemented the New Deal initiative, which supported labor organizations and unionization.
Step-by-step explanation:
The U.S. president who implemented the "New Deal" initiative, which created federal support for labor organizations and urged workers to unionize, was Franklin D. Roosevelt. The New Deal was a series of programs and projects aimed at providing relief, recovery, and reform during the Great Depression. One of the key aspects of the New Deal was the establishment of labor laws that protected workers' rights and encouraged unionization.
Learn more about Franklin D. Roosevelt and the New Deal