Who has overall responsibility for intelligence support to the President?

The Director of National Intelligence (DNI) has overall responsibility for intelligence support to the President. This role is crucial as the DNI oversees the entire intelligence community, ensuring that information is accurately collected, analyzed, and disseminated in a way that supports the President's decision-making process regarding national security and foreign policy. The DNI serves as the principal advisor to the President on intelligence matters, coordinating efforts across various agencies to provide a cohesive understanding of global situations.

The other roles in the options, while critical in their own domains, do not have the same overarching responsibility for intelligence support. The Secretary of Defense manages military operations and defense intelligence but does not have the broad oversight of the entire intelligence community. The National Security Advisor provides counsel to the President on national security issues, but it is the DNI who organizes and integrates intelligence support. The Chief of Staff typically focuses on managing the President's schedule and advising on domestic and political matters rather than directly overseeing intelligence operations. Thus, the Director of National Intelligence is the best answer, embodying the leadership role in providing comprehensive intelligence support to the President.