The Sierra Club, with over 700,000 members nationwide, is the oldest grassroots environmental organization in the United States. It sees its purpose as preservation, protection, and enhancement of the natural environment.
Article IV, Section 4. This section is called the Guarantee Clause, because by its terms the federal government makes certain guarantees to the states. One of theseâprotection from foreign invasionâcontinued Congress's prior obligation under the Articles of Confederation.
The Constitution defines the powers of each branch. Article I defines the legislative, or congress. Article II defines the executive, or presidency. Article III creates broad outlines for the judicial, primarily the Supreme Court. Article IV defines the relations between the states and the federal government.