The checks and balances put inplace by the founders who designed the US Constitution with the two houses of parliament, the Supreme Court, the US Federal Reserve as central bank, and the state governments and large city governments, in a delicate system of balance. The entire house elected every 2 years and the presidency for 3+1 years 3 for governing and the 4th year of primaries and preparing for the next election are other forms of this checks and balances.
Jerome Powell at the Fed will be governor till Jan 2028 and Fed chair till May 2026. Powell plans to complete his term in office and preserve the Fed's independence as designed in the charter for the central bank.