Which executive role involves advising the President on defense issues?

The role that involves advising the President on defense issues is the Secretary of Defense. This position is crucial within the President's Cabinet and focuses specifically on ensuring the national security of the United States. The Secretary of Defense is responsible for overseeing the Department of Defense, managing the armed forces, and formulating military strategies. This position plays a key role in making recommendations and providing expertise on matters such as military operations, defense budgets, and the overall security posture of the nation.

While other positions listed, such as the Chief of Staff and the Attorney General, have significant and vital roles within the government, they do not specifically focus on defense issues. The Chief of Staff primarily manages the President's schedule and staff, and the Attorney General oversees legal matters and the justice system. The Secretary of Education, meanwhile, focuses on educational policies and issues related to schools and learning. Each of these roles is important within the executive branch, but only the Secretary of Defense directly addresses matters of national defense and military affairs.