This document contrasts the roles and functions of the EXOP, PMO, OMB, NSC, and various units within the PMO. The EXOP includes the President's closest advisors and confidants, such as the Press Secretary and Chief of Staff, who provide policy advice, liaison, and administration. The PMO directorates focus on policy, communications and strategy, government and public relations. The OMB helps organize the President's budget and guides it through Congress, also providing financial advice. The NSC advises the President on national security issues. Units within the PMO control information to the PM, manage relations with the public and party, process media questions, and provide policy advice and ensure departments deliver