What are two great historical principles cited by South Carolina in asserting its right to re-establish itself as a sovereign again?

1. The Declaration of Independence. The Declaration of Independence states that "whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness". South Carolina argues that this principle gives it the right to secede from the Union if it believes that the federal government is no longer acting in the best interests of its citizens.

2. The Articles of Confederation. The Articles of Confederation were the first governing document of the United States after the Revolutionary War. Article II of the Articles of Confederationstates that "Each state retains its sovereignty, freedom, and independence, and every Power, Jurisdiction, and right, which is not by this confederation expressly delegated to the United States, in Congress assembled." South Carolina argues that this principle means that the federal government only has the powers that are specifically delegated to it by the states, and that any other powers belong to the states.