Which of the following powers does not belong to the president?

The power to conduct elections does not belong to the president, as it is primarily a responsibility managed by state and local authorities. The U.S. Constitution grants the states the authority to regulate the administration of elections, including how they are conducted and who oversees them. This ensures a decentralized approach to the electoral process, reflecting the principles of federalism.

In contrast, declaring war, appointing ambassadors, and making treaties are powers that are explicitly assigned to the president by the Constitution. The president serves as the Commander in Chief of the Armed Forces and has the authority to initiate military actions, though the authority to declare war officially rests with Congress. Appointing ambassadors and making treaties also fall under the president's purview, with the requirement that treaties must be ratified by a two-thirds majority in the Senate. Thus, the president plays a crucial role in foreign diplomacy through these processes, highlighting the distinct separation of powers and responsibilities within the U.S. government.