He’s appointed three of the five current board members with two vacancies yet to be filled.
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Aren’t there 12 voting members of the FOMC?
https://en.wikipedia.org/wiki/Federal_Open_Market_Committee
Seven members of the Board of Governors. The President of the New York Fed. And the presidents of four other Federal Reserve Banks on a rotating basis. Only the members of the Board of Governors are presidential appointees.