My belief is that one has to be an American citizen to own real estate, and if a corporate entity then 2/3rds must be owned by American citizens and no foreign entities. Meaning that foreign corporations and governments cannot be part of that equation but foreign individuals can (2+1). Property currently owned by the new exclusionary class have three years to sell, or become a citizen. If it cannot (or will not) sell after three years then the properties will be sold via public auction. There is a shit ton of good properties owned by foreign entities and individuals, which is one of the reasons real estate has been inflated in urban areas. This would be a good start to return to a more normal supply & demand model for real estate. Farmland should be even more strict.