Which of the following represents a power exclusively held by the federal government?

Regulating interstate commerce represents a power exclusively held by the federal government because it is specifically granted to Congress by the Constitution in Article I, Section 8. This power allows the federal government to manage trade that crosses state lines, ensuring a consistent regulatory environment across the nation. The Founding Fathers recognized that commerce passing through state borders could be hindered by inconsistent state regulations, so they centralized this authority to promote a stable and prosperous economy.

In contrast, conducting elections is primarily a power reserved for the states, as each state determines the procedures and regulations surrounding elections within its borders. Establishing local governments is also a power reserved for the states, as states have the authority to create local government structures to best serve their populations. Similarly, licensing professionals is usually managed at the state level, with each state setting its own requirements for various professions.