If by reason of any defeasance or conditional clause or clauses contained in any deed of conveyance of property to the National Home for Disabled Volunteer Soldiers, which property is owned by the United States, the full and complete enjoyment and use of such property is threatened, the Attorney General, upon request of the President, shall institute in the United States district court for the district in which the property is located such proceedings as may be proper to extinguish all outstanding adverse interests. The Attorney General may procure and accept, on behalf of the United States, by gift, purchase, cession, or otherwise, absolute title to, and complete jurisdiction over, all such property.