
The United States Congress is one of the three coequal branches of government and is the central law-making body. Established by Article I of the Constitution, the Legislative Branch consists of the House of Representatives and the Senate, which together form the United States Congress. Congress has the sole authority to enact legislation and declare war, the right to confirm or reject many Presidential appointments, and substantial investigative powers. Congress also has the power to regulate commerce with foreign nations and among the several states, to raise and support armies, to provide for organizing, arming, and disciplining the militia, and to exercise exclusive legislation in all cases over the District constituting the seat of government of the United States.
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What You'll Learn

The power to declare war
The U.S. Constitution grants Congress the power to declare war, as outlined in Article I, Section 8, Clause 11. This clause empowers Congress to issue formal declarations of war and make rules concerning captures of enemy property on land or at sea.
The Declare War Clause has historically been interpreted as a limit on presidential power, with congressional approval deemed necessary for engaging in armed conflict. For example, Congress issued a formal declaration of war for the War of 1812, and approved lesser uses of force, such as the Quasi-War with France in 1798 and conflicts with Native American tribes.
However, in modern times, there has been ambiguity surrounding the Declare War Clause, with presidents using military force without formal declarations or express consent from Congress. For instance, President Truman ordered U.S. involvement in the Korean War without a formal declaration of war.
Presidents have also claimed authorization from indirect congressional actions, such as approval of military spending, or even Congress's failure to object to ongoing hostilities. Additionally, presidents may use their commander-in-chief power to deploy U.S. forces in situations that do not amount to war, such as peacekeeping missions or responding to sudden attacks.
The Supreme Court has stated that the United States possesses inherent war powers as a sovereign country, which can complicate the interpretation of the Declare War Clause. The law regarding this clause remains unsettled due to the limited number of judicial decisions interpreting it.
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The authority to enact legislation
The Constitution grants Congress the sole authority to enact legislation. This means that it is the only part of the US government that can make new laws or change existing ones. Congress is also empowered to enact laws deemed "necessary and proper" for the execution of the powers given to any part of the government under the Constitution.
Congress is made up of the House of Representatives and the Senate, which together form the United States Congress. The House of Representatives is composed of members chosen every second year by the people of the several states, with representatives and direct taxes apportioned among the states in proportion to their respective numbers. The Senate has the sole power to confirm appointments made by the President, such as Supreme Court justices.
Congress's legislative authority includes the establishment of an annual budget for the government, which involves levying taxes and tariffs to provide funding for essential government services. If enough money cannot be raised to fund the government, Congress may authorize borrowing to make up the difference. Congress can also mandate spending on specific items, such as legislatively directed spending, commonly known as "earmarks," which specify funds for a particular project.
Congress also has the power to regulate commerce with foreign nations, Indian tribes, and among the states. It can establish uniform rules of naturalization and uniform laws on the subject of bankruptcies throughout the United States. Additionally, Congress has the authority to organize, arm, and discipline the Militia, reserving to the states the appointment of officers and the authority to train the Militia according to Congress's prescribed discipline.
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The ability to raise and support armies
The U.S. Constitution grants Congress the power to raise and support armies, as outlined in Article I, which defines the role of the legislative branch of the U.S. government. This power is further detailed in Clause 12 of Section 8, which specifies that Congress has the authority to:
> "raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years."
This clause was included in the Constitution to address the fear of standing armies, limiting congressional appropriations for this purpose to two-year terms. However, this limitation does not extend to appropriations for equipment and other means deemed necessary for the common defence.
The power to raise and support armies is distinct from Congress's authority to organise and govern the militia, which is outlined in Clause 16 of Section 8. The militia consists of those employed in the service of the United States, with the appointment of officers and training methods left to the individual states.
The Supreme Court has upheld Congress's broad constitutional power to raise, regulate, and conscript manpower for the military. This power is considered distinct from its authority to call upon the militia and is not limited by it. The Court has also ruled that Congress may legislate in this area at the expense of traditional state sovereignty.
In summary, the U.S. Constitution grants Congress explicit authority to raise and support armies, with certain limitations on the duration of appropriations. This power is an essential aspect of Congress's ability to provide for the common defence and ensure the security of the nation.
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The right to confirm or reject presidential appointments
The United States Constitution outlines the role of Congress within the federal government, including its right to confirm or reject presidential appointments.
Congress, which consists of the Senate and the House of Representatives, plays a crucial role in the appointment process of certain government officials. The Appointments Clause, found in Article II, Section 2, Clause 2 of the Constitution, empowers the President to nominate and appoint public officials with the advice and consent (confirmation) of the Senate. This clause ensures a separation of powers and prevents Congress from unilaterally filling offices with its supporters, which would undermine the President's control over the executive branch.
The Appointments Clause distinguishes between two types of officers: principal officers and inferior officers. Principal officers, such as Supreme Court Justices, ambassadors, Cabinet secretaries, and federal judges, must be appointed by the President with the confirmation of the Senate. On the other hand, Congress may vest the appointment of inferior officers in the President alone, the judiciary, or department heads. This distinction ensures that important government positions are staffed with accountable individuals, while also providing flexibility in the appointment process.
The Senate plays a critical role in providing advice and consent for appointments. While the majority of presidential nominations are confirmed, there have been instances where the Senate has voted against confirming an official. The Senate's rules regarding the number of votes needed to end debate on a nomination have evolved over time, with a simple majority now being sufficient in most cases.
The President also has the authority to make recess appointments under Article II, Section 2, Clause 3, which allows appointments to be made during a recess of the Senate without their confirmation. This power further balances the dynamic between the executive and legislative branches.
In summary, the Constitution grants Congress, through the Senate, the significant role of confirming or rejecting presidential appointments for principal officers. This right ensures a system of checks and balances, preventing the concentration of power in any single branch of government.
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The power to regulate commerce with foreign nations
The US Constitution grants Congress the power to "regulate commerce with foreign nations, and among the several States, and with the Indian Tribes". This is known as the Commerce Clause, referring to Article 1, Section 8, Clause 3 of the Constitution.
The Commerce Clause has been interpreted broadly by the courts for much of US history. The Supreme Court held in Gibbons v. Ogden (1824) that intrastate activity could be regulated under the Commerce Clause, as long as it is part of a larger interstate commercial scheme. In Swift and Company v. United States (1905), the Supreme Court ruled that Congress could regulate local commerce, provided that it could become part of a continuous "current" of commerce involving the interstate movement of goods and services.
The Commerce Clause has been used to justify Congress exercising legislative power over the activities of states and their citizens, leading to controversy regarding the balance of power between the federal government and the states. The Supreme Court's early interpretations of the Commerce Clause focused on interpreting the meaning of "commerce" while paying less attention to the meaning of "regulate". Some argue that "commerce" refers simply to trade or exchange, while others claim that it describes broader commercial and social intercourse between citizens of different states.
The Supreme Court attempted to curtail Congress's broad legislative mandate under the Commerce Clause in United States v. Lopez (1995), returning to a more conservative interpretation of the clause. The Court held that Congress only has the power to regulate the channels of commerce, the instrumentalities of commerce, and action that substantially affects interstate commerce.
In summary, the power to regulate commerce with foreign nations granted to Congress by the Constitution has been interpreted broadly by the courts, but with some limits on Congress's power established by key Supreme Court cases.
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Frequently asked questions
The Constitution grants Congress the power to make laws, levy taxes, dispose of and regulate US territories, regulate commerce, and establish a uniform rule of naturalization. Congress also has the authority to declare war, raise and support armies, and organize, arm, and discipline the militia.
Congress is one of the three coequal branches of the US government, alongside the executive and judicial branches. It is the central law-making body, with the sole authority to enact legislation.
Congress must pass a bill in both chambers, the House of Representatives and the Senate, before it goes to the President for consideration. If the President does not veto the bill within 10 days, it becomes law. Congress can also override a presidential veto with a two-thirds vote in both chambers.
Congress has the power to shape the judiciary by confirming or rejecting federal judges, including Supreme Court justices. It also has the authority to impeach and try members of the federal judiciary.
Congress has the power to regulate commerce with foreign nations and declare war. It also plays a role in foreign policy by confirming or rejecting treaties.

























