Final answer:
Franklin D. Roosevelt was the president who prioritized including African Americans in his cabinet through his unofficial 'Black Cabinet'.
Step-by-step explanation:
The president who made it a priority to fill his cabinet with Black Cabinet members was Franklin D. Roosevelt. Roosevelt's unofficial "Black Cabinet" included influential African Americans like Mary McLeod Bethune. While not all were cabinet secretaries, they did provide valuable advice on racial issues. Dr. Robert Weaver, a member of this group, went on to become the first Black cabinet secretary in 1966 under President Lyndon Johnson. Roosevelt also broke ground by appointing the first Black federal judge and promoting the first African American to brigadier general during his presidency.