by the United States government

“ Management and liquidation functions of Government National Mortgage Association § 1722. Benefits and burdens incident to administration of functions and operations under sections 1720 and 1721 § 1723. Management § 1723a. General powers of Government National Mortgage Association and Federal National Mortgage Association § 1723b. Investment of funds § 1723c. Obligations, participations, or other instruments as lawful investments; acceptance as security ”