Original sentence: The CMC reports directly to the Secretary of the Navy but not to the Chief of Naval Operations and is responsible for ensuring the organization, policy, plans, and programs for the Marine Corps as well as advising the President, the Secretary of Defense and the Secretary of the Navy on matters involving the Marine Corps
Edited sentence: The CMC reports directly to the Secretary of the Navy—but not to the Chief of Naval Operations—and is responsible for ensuring the organization, policy, plans, and programs for the Marine Corps as well as advising the President, the Secretary of Defense and the Secretary of the Navy on matters involving the Marine Corps