Who is the Chairman of the Joint Chiefs of Staff?

The Chairman of the Joint Chiefs of Staff is a critical leadership position within the U.S. military, responsible for advising the President, the Secretary of Defense, and the National Security Council on military matters. General Joseph Dunford served in this role from 2015 to 2019, being the 19th person to hold the position. His role involved integration of the armed forces, as well as representing their interests nationally and internationally.

The other individuals listed have held significant positions but are not the Chairman. For example, SMA Daniel A. Dailey was the Sergeant Major of the Army, focusing on matters related to enlisted soldiers, and did not hold the rank of General necessary for the role of Chairman. Similarly, Donald Trump was the President during Dunford's term, and James Mattis served as the Secretary of Defense, making substantive military decisions but not directly serving as Chairman. Thus, General Dunford's unique role as a senior military officer makes him the correct answer to this question.