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the federal principle or system of government.

The Constitution establishes a federal system that balances national and state powers, but it grants controlling authority to the national government in its supremacy clause.

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review by the US Supreme Court of the constitutional validity of a legislative act.

A key authority exercised by the Supreme Court is judicial review, the power to review an action of the legislative or executive branch and declare it unconstitutional.

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a preliminary or preparatory statement; an introduction.

The first part, the Preamble, describes the purpose of the document and the government it creates.

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The clausein United States Constitution's Article VI, stating that all laws made furthering the Constitution and all treaties made under the authority of the United States are the “supreme law of the land.”

Since this clause affirms that the Constitution and federal laws are the supreme law of the land, it is often called the supremacy clause.

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responsible for interpreting and enforcing federal laws. Type of: judicatory, judicature, judicial system, judiciary. the system of law courts that administer justice and constitute the judicial branch of government.

The Supreme Court and lower federal courts make up the federal judiciary, or federal court system.

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is the highest-ranking executivein a company, and their primary responsibilities include making major corporate decisions, managing the overall operations and resources of a company, and acting as the main point of communication between the board of directors and corporate operations.

As chief executive, the president is the head of the largest branch of the federal government. Under the Constitution, the president and the rest of the executive branch must "take Care that the Laws be faithfully executed."

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a national legislative body, especially that of the US. The US Congress, which meets at the Capitol in Washington DC, was established by the Constitution of 1787 and is composed of the Senate and the House of Representatives.

For example, the president can veto a bill, but the bill can still become law if a two-thirds majority of Congress votes to override the veto.

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a statement in the U.S. Constitution (Article I, Section 8) granting Congress the power to pass all laws necessary and proper for carrying out the enumerated list of powers.

In addition, it may "make all laws which shall be necessary and proper" to carry out such powers. This clause has been called the elastic clause because it gives Congress flexibility to fulfill its duties.