Yellen is Treasury Secretary, she is not the Chairman of the Federal Reserve. Jerome Powell, a conservative appointed by Trump, remains as chairman. I'm talking about monetary policy, (as opposed to fiscal policy) that is controlled by the federal reserve,
Fiscal policy and monetary policy are two separate policy tools that are managed by different entities in the United States government.
Fiscal policy is controlled by the Treasury Department and the legislative branch of government. The Treasury Department is responsible for managing government spending and revenue collection. This includes the collection of taxes and the issuance of government debt, as well as the administration of government programs like Social Security and Medicare. The legislative branch of government, specifically Congress, has the power to set government spending levels, tax rates, and other fiscal policies through the passage of laws and budgets.
On the other hand, monetary policy is controlled by the Federal Reserve, which is an independent agency that is not directly controlled by the President or Congress. The Federal Reserve is responsible for setting interest rates and managing the money supply in the economy to achieve its dual mandate of maximum employment and stable prices.
While the President has some influence over both fiscal and monetary policy, their direct control is limited. The President can propose and advocate for certain fiscal policies and budgets, but ultimately, it is up to Congress to pass those policies into law. The President also has some influence over the Federal Reserve by appointing members of its Board of Governors, but the Federal Reserve operates independently and is not subject to direct control by the President or Congress.
In summary, fiscal policy is controlled by the Treasury Department and Congress, while monetary policy is controlled by the Federal Reserve. While the President has some influence over both areas, his direct control is limited.