The power of the executive branch is vested in the President, who also serves as Commander in Chief of the Armed Forces. The President appoints the Cabinet and oversees the various agencies and departments of the federal government. While federal administrative agencies are given the scope of their authority by Congress, they are part of the Executive Branch.
Presidential documents include executive orders and proclamations. These may be found in the Federal Register and in Title 3 of the Code of Federal Regulations. The most comprehensive source for presidential documents is the Compilation of Presidential Documents (consists of weekly and daily compilations). This contains executive orders and proclamations as well as nominations, announcements, transcripts of speeches, and press conferences. Another useful resource containing a variety of presidential documents is the Public Papers of the Presidents.