https://prepareforchange.net/2019/01/29/president-kennedy-the-fed-and-executive-order-11110/

On June 4, 1963, a little known attempt was made to strip the Federal Reserve Bank of its power to loan money to the government at interest. On that day President John F. Kennedy signed Executive Order No. 11110 that returned to the U.S. government the power to issue currency, without going through the Federal Reserve. Mr. Kennedy’s order gave the Treasury the power “to issue silver certificates against any silver bullion, silver, or standard silver dollars in the Treasury.” This meant that for every ounce of silver in the U.S. Treasury’s vault, the government could introduce new money into circulation.

With the stroke of a pen, Mr. Kennedy was on his way to putting the Federal Reserve Bank of New York out of business. If enough of these silver certificates were to come into circulation they would have eliminated the demand for Federal Reserve notes"