Monetary policy in the United States is under the control of:

Monetary policy in the United States is primarily managed by the Federal Reserve, which is the central bank of the country. The Federal Reserve is responsible for implementing policies that influence interest rates, control inflation, and manage employment levels through various tools, such as open market operations, the discount rate, and reserve requirements.

This institution operates independently of the executive branch and legislative branch, allowing it to make decisions based on economic conditions rather than political pressure. The goal of the Federal Reserve is to maintain a stable financial system and promote maximum sustainable employment while keeping inflation at a targeted level.

While the U.S. Treasury plays a crucial role in fiscal policy and the government’s financial matters, and the President may influence economic policy through appointments and broader political objectives, it is the Federal Reserve that directly influences money supply and interest rates. The U.S. Senate's role is legislative, and while it can affect the economy through laws and budgets, it does not control monetary policy.