Which of the following powers is NOT specifically granted to Congress?

The power to negotiate foreign treaties is not specifically granted to Congress; rather, it is a power reserved for the President. The Constitution outlines that the President has the authority to make treaties with other nations, but such treaties must receive the advice and consent of the Senate. This distinction highlights the separation of powers within the federal government, where the executive branch handles foreign relations, while Congress manages other legislative functions.

In contrast, the powers listed in the other options—levying import taxes, defining and punishing piracies, and establishing post roads—are explicitly granted to Congress by the Constitution. These powers are detailed in Article I, Section 8, which enumerates the powers of Congress, establishing its role in taxation, naval matters, and the maintenance of communication and infrastructure. Understanding this distinction helps clarify the specific functions and limitations of Congress compared to the President in the context of U.S. governance.