It doesn't matter what the executive order says. It has to invoke laws passed by Congress that provide the President with the authority to do anything. In this case, that law is the IEEPA. Read 50 U.S.C. 1702. He is limited to foreign transactions.
Executive orders are part of the federal rulemaking process. Rulemaking fills in the blanks left deliberately by Congress. Whether or not the President can use a national emergency to interfere with domestic financial transactions is not a blank Congress appears to have left in the IEEPA.
Executive orders are part of the federal rulemaking process. Rulemaking fills in the blanks left deliberately by Congress. Whether or not the President can use a national emergency to interfere with domestic financial transactions is not a blank Congress appears to have left in the IEEPA.