Final answer:
All presidents since the late 1920s have established the President's Cabinet and witnessed growth in federal bureaucracy.
Step-by-step explanation:
All presidents since the late 1920s have shared a commonality in the organization of the executive branch. One key aspect is the establishment of the President's Cabinet, which consists of heads of 15 executive departments. This tradition was first introduced by George Washington, who created a group of advisors to assist in administering presidential duties. Additionally, the executive branch has seen significant growth in federal bureaucracy, with more than 60 government agencies and over two million civilian employees. Only a small fraction of these employees work in Washington, D.C., while the majority are spread across the country and the world.