The phrase law of the land is a legal term, equivalent to the Latin lex terrae (or legem terrae in the accusative case). It refers to all of the laws in force within a country or region, including both statute law and common law.
Sovereignty is the quality of having supreme, independent authority over a geographic area, such as a territory. It can be found in a power to rule and make law that rests on a political fact for which no purely legal explanation can be provided. In theoretical terms, the idea of “sovereignty”, historically, from Socrates to Thomas Hobbes, has always necessitated a moral imperative on the entity exercising it.
Sharia law, (Arabic: شريعة šarīʿah, IPA: [ʃaˈriːʕa], “legislation”; also spelled shariah, sharīʿah; also known as Islamic law, قانون إسلامي qānūn ʾIslāmī ) is the moral code and religious law of Islam.
The definitions, above, are verbatim quotations from Wikipedia (granted, not the absolute authority, but it will get you started). Just reading the definitions gives you (or me, at least) the sense of the real problems that are hatched when allowing any exceptions to the Law of the Land in favor of Shariah. When this creeps into our “Law of the Land,” we begin to lose sovereignty. I believe this problem is much more deserving of research and extensive article than the one you threw out there to fill a couple inches of news column.

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