Which of the following is NOT a responsibility of the president as chief diplomat?

The role of the president as chief diplomat primarily encompasses responsibilities directly tied to managing the nation's foreign relations. Appointing ambassadors is essential, as ambassadors represent the U.S. in other countries and play a crucial role in diplomatic relations. Similarly, negotiating treaties is a fundamental duty, as the president engages with other nations on matters that significantly impact international relations and U.S. interests. Dealing with foreign governments is also intrinsic to the president's role, as it involves the ongoing management of diplomatic relations and foreign policy matters.

While the appointment of economic officers is important for a country’s economic relations and strategy, this responsibility does not fall directly within the purview of the chief diplomat. Economic officers typically operate within the Department of Commerce or similar agencies and support the administration's broader foreign policy goals rather than being a direct responsibility of the president in the diplomatic context. Thus, this option is correctly identified as not a direct responsibility of the president as chief diplomat.