"Some people are opposed to the existence of the Federal Reserve, the central bank of the United States, arguing that it is unconstitutional."
https://www.investopedia.com/ask/answers/082115/why-do-some-people-claim-federal-reserve-unconstitutional.asp
"Rep. Ron Paul in an interview on Glenn Beck last night said that the Fed was never in the plan of the Founding Fathers who drafted the Constitution.
He said that in 1913 the Congress shirked their constitutional responsibilities concerning the nation’s money and handed it over to a private corporation in the form of a central banking system. The Federal Reserve System is not a part of our federal government, and there is no reserve of real money (gold and silver), and it is not constitutional."
"I believe the Federal Reserve is unconstitutional because the Constitution grants Congress the power to coin and regulate money. It doesn't say that Congress can take the power away from itself and give it to somebody else!"
http://www.ronpaulforums.com/showthread.php?30464-Constitutionality-of-the-Federal-Reserve
"The power "to coin money" and "regulate the value thereof" has been broadly construed to authorize regulation of every phase of the subject of currency."
https://constitution.congress.gov/browse/essay/artI-S8-C5-1/ALDE_00001066/
"the Federal Reserve controls monetary policy by deciding how many dollars circulate through public hands."
https://thoughtcatalog.com/jeremy-london/2018/08/federal-reserve-conspiracies/
"The Fed controls the supply of money by increasing or decreasing the monetary base."
https://www.stlouisfed.org/on-the-economy/2018/july/federal-reserve-control-supply-money
"The Federal Reserve System manages the money supply in three ways"
https://findanyanswer.com/what-are-the-three-ways-the-federal-reserve-can-change-the-money-supply
"The United States made several attempts to regulate banks and manage the money supply at a national level before the creation of the Federal Reserve System"
https://www.federalreservehistory.org/essays/before-the-fed
"The money supply is the total amount of money—cash, coins, and balances in bank accounts—in circulation.
The money supply is commonly defined to be a group of safe assets that households and businesses can use to make payments or to hold as short-term investments."
https://www.federalreserve.gov/faqs/money_12845.htm
"The U.S. Federal Reserve controls the supply of money in the U.S., and when it expands that supply it is often described as "printing money.""
https://www.investopedia.com/ask/answers/082515/who-decides-when-print-money-us.asp
"The Bureau of Engraving and Printing, under the U.S. Department of Treasury, does the actual printing of cash for circulation."
https://www.thebalance.com/is-the-federal-reserve-printing-money-3305842
"Why, you ask? Because the Congress went against the Constitution of the United States when it passed this Federal Reserve Act, for it specifically states that Congress, and only Congress shall have the power to coin and regulate the money of the country."
https://www.michaeljournal.org/articles/politics/item/the-corrupt-federal-reserve-corporation
"The Constitution makes no mention of a central bank. While there have been historical debates on the constitutionality of a central bank, I see no justification for the argument that the Federal Reserve is constitutional. The federal government only has about thirty enumerated powers delegated to it in the Constitution. The power to create a central bank is not explicitly granted to the federal government in our founding document. Due to my strict interpretation of the Constitution, I find the Federal Reserve to clearly violate the Constitution."
https://www.freedomworks.org/content/top-10-reasons-end-federal-reserve