Final answer:
The executive power of the President of the United States has expanded significantly since the Constitution was ratified in 1789 due to broader interpretations, an increase in federal bureaucracy, and new notions like executive privilege.
Step-by-step explanation:
The executive power granted to the President by Article II, Section 1 of the United States Constitution has evolved significantly since its ratification in 1789. Initially, the drafters of the Constitution anticipated a relatively strong chief executive, but also one bounded by checks and balances from other branches of government.
Over the years, the term 'executive power' has seen broad interpretations to justify actions beyond the specific powers enumerated. Through the expansion of the federal bureaucracy, development of institutions like the FBI, and the notion of executive privilege, presidential authority has grown. Additionally, the president's duty to 'ensure the laws be faithfully executed' suggests an intrinsic duty to protect the nation, adding to the scope of the office.
Overall, the power of the presidency has expanded significantly due to circumstances and the need to respond to a growing nation and increasingly complex domestic and international issues. However, it is essential to note that for a president to be truly effective, there must be collaboration with Congress and other branches of government through compromise and persuasion.