What term refers to the powers granted to the President that are not explicitly defined by the Constitution?

The term that refers to the powers granted to the President that are not explicitly defined by the Constitution is "implied powers." These powers are understood to exist based on the President's role and duties, allowing for flexibility in governance. Implied powers enable the President to take actions that are not specifically stated in the Constitution but are deemed necessary and proper to fulfill the functions of the office effectively.

For instance, while the Constitution grants Congress the power to declare war, the President, as the Commander-in-Chief, can deploy military forces without formal declarations, thus exercising implied powers. This broad interpretation allows the President to adapt to new circumstances and challenges that may not have been foreseen by the framers of the Constitution.

The other choices do not accurately capture this concept. Executive powers typically refer to the powers specifically granted to the President by the Constitution and laws enacted by Congress. Enumerated powers are those explicitly listed in the Constitution. While informal powers can refer to the influence and authority that the President exercises outside of formal legal authority, the term specifically recognized in this context is "implied powers."