
The legislative powers of the United States Congress are outlined in the Constitution, with Article I, Section I stating that All legislative Powers herein granted shall be vested in a Congress of the United States. This article establishes the Senate and House of Representatives, and defines the powers and responsibilities of Congress, including the power to tax and spend for welfare and defence, regulate commerce, establish citizenship laws, and declare war. The Constitution also grants Congress the authority to impeach the President and decide on the punishment for treason.
| Characteristics | Values |
|---|---|
| Legislative powers | Vested in a Congress of the United States, which consists of a Senate and a House of Representatives |
| Powers related to national defense | Exclusive power to declare war, raise and maintain armed forces, and make rules for the military |
| Impeachment powers | Authority to impeach a sitting President, with the trial conducted by the Senate |
| Power to tax and spend | Ability to lay and collect taxes, duties, imposts, and excises for the common defense and general welfare of the United States |
| Power to regulate commerce | Authority to regulate commerce with states, foreign nations, and Native American tribes |
| Power to establish laws | Ability to make laws necessary and proper for executing the powers of the government |
| Power over intellectual property | Securing exclusive rights for authors and inventors to promote the progress of science and useful arts |
| Power to raise and support armies | Raise and support armies, with appropriations not exceeding two years |
| Power to organize militias | Authority to organize, arm, and discipline militias, while reserving the appointment of officers to the states |
| Power to naturalize citizens | Establish uniform rules for naturalization and citizenship |
| Power to define and punish crimes | Define and punish piracies, felonies on the high seas, and offenses against the law of nations |
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What You'll Learn

Power to tax and spend
The US Constitution grants Congress the power to tax and spend for the general welfare and common defence of the United States. This is one of the eighteen enumerated powers of Congress, outlined in Article I, Section 8 of the Constitution. This section states that Congress has the power to "lay and collect taxes, duties, imposts and excises" to meet the country's financial obligations and ensure its overall well-being.
The power to tax and spend is a significant check on the executive branch, known as the "power of the purse." This power allows Congress to influence policy and control government spending by allocating funds to specific areas. The Supreme Court affirmed this power in Helvering v. Davis, upholding Social Security as a valid exercise of Congress's ability to spend for the general welfare.
While the House of Representatives holds the exclusive power to originate revenue and appropriation bills, both the Senate and the House have equal legislative authority in this regard. The Necessary and Proper Clause of the Constitution, Article I, Section 8, Clause 18, further bolsters Congress's authority by enabling them to \"make all laws which shall be necessary and proper\" to execute their enumerated powers.
This clause has been interpreted broadly, as seen in McCulloch v. Maryland, where the Supreme Court recognised the federal government's authority to establish a national bank under the tax and spend clause, superseding state interference. Additionally, Congress can impose taxes on the importation of persons, as outlined in Article I, which states that a tax or duty may be imposed on the migration or importation of persons, not exceeding ten dollars per person.
In summary, the constitutional power to tax and spend gives Congress significant influence over the nation's finances and policy direction, making it a vital aspect of Congress's responsibilities and a key check on the executive branch's power.
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Authority to regulate commerce
The US Constitution grants Congress the power to regulate commerce with foreign nations, among the states, and with Native American tribes. This power, known as the Interstate Commerce Clause, enables Congress to create uniform rules and policies that govern trade and economic activities across state lines and with other countries. It ensures a consistent approach to commerce, facilitating fair and efficient trade practices within the United States and in international markets.
The authority to regulate commerce is a critical aspect of Congress's enumerated powers, outlined in Article I, Section 8 of the Constitution. This clause empowers Congress to establish standards and regulations that govern business transactions, ensuring a level playing field for all participants. It allows Congress to address issues such as interstate trade barriers, tariffs, and the movement of goods and services across state lines. By granting Congress this power, the Founding Fathers intended to prevent states from imposing unfair restrictions on trade, promoting a unified and robust national economy.
Congress's ability to regulate commerce with foreign nations is essential for conducting international trade and maintaining positive economic relations with other countries. It involves negotiating trade agreements, setting import and export policies, and addressing global economic issues. This power enables the United States to participate effectively in the global marketplace, promoting economic growth and competitiveness on an international scale. Additionally, Congress can address concerns about unfair trade practices by foreign entities and protect American businesses and workers from adverse effects.
The power to regulate commerce with Native American tribes is a unique aspect of Congress's authority. This provision recognises the sovereignty of Native American tribes and ensures that commerce with them is conducted fairly and respectfully. Congress can establish guidelines for trade and economic interactions with tribal nations, promoting equitable economic opportunities for these communities while preserving their cultural and political autonomy. This power also enables Congress to address any disputes or concerns that may arise in commercial activities involving Native American tribes.
In conclusion, the constitutional power to regulate commerce empowers Congress to create a uniform and fair economic environment within the United States and in its dealings with foreign nations and Native American tribes. This authority ensures the country's economic stability and growth, protects American businesses and consumers, and promotes respectful and beneficial trade relations with tribal nations. By exercising this power, Congress plays a pivotal role in shaping the country's economic landscape and its position in the global economy.
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War powers
Congress has the power to make "Rules for the Government and Regulation of the land and naval Forces". This includes the power to establish and fund the armed forces, set their size, and provide for their governance. Congress can also
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Impeachment powers
The US Constitution grants Congress the power to impeach federal officials. This power is explicitly stated in Article I, Section 2 and 3 of the Constitution, with the House of Representatives having the "sole Power of Impeachment". The House initiates impeachment proceedings by approving, through a simple majority vote, articles of impeachment against an official. This is followed by the Senate, which holds the "sole Power to try all Impeachments". The Senate sits as a High Court of Impeachment, considering evidence, hearing witnesses, and voting to acquit or convict the impeached official.
The president, vice president, and all civil officers of the United States are subject to impeachment. Impeachment charges can be brought against an official for "treason, bribery, or other high crimes and misdemeanors". The definition of "high crimes and misdemeanors" has long been debated and is not explicitly defined in the Constitution. However, it has been interpreted to include political offences, personal misconduct, gross neglect, usurpation, and habitual disregard for the public interest.
For an impeachment conviction to be reached, a two-thirds majority vote of the Senate is required. If convicted, the sanctions for an impeached individual are limited to removal from office and potentially a bar from holding future office. However, impeachment does not preclude criminal liability, and the impeached official remains "liable and subject to Indictment, Trial, Judgment, and Punishment, according to Law".
The impeachment process is an important check on the Executive and Judicial Branches, providing a mechanism to hold government officials accountable for violations of the law and abuses of power. Since 1789, about half of Senate impeachment trials have resulted in conviction and removal from office.
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Law-making powers
The legislative powers of the United States Congress are explicitly stated in the Constitution. Article I Section I states, "All legislative Powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives". The House of Representatives is composed of members chosen every second year by the people of the several states, and the electors in each state must have the qualifications required for electors of the most numerous branch of the state legislature.
The enumerated powers of Congress are laid out in Section 8 of Article I. The eighteen enumerated powers include the power to tax and spend for the general welfare and the common defence, the power to borrow money, and the power to regulate commerce with states, other nations, and Native American tribes.
Congress also has the authority to establish citizenship naturalization laws and bankruptcy laws, and to promote the progress of science and the useful arts by securing for limited times the exclusive rights of authors and inventors to their respective writings and discoveries.
Article I, Section 8, Clause 18, also known as the Necessary and Proper Clause, gives Congress the authority to create any laws that are necessary and proper to carry out the enumerated powers of the Constitution. This clause has been broadly interpreted, widening the scope of Congress's legislative authority. For example, in McCulloch v Maryland, the federal government's authority to establish a national bank under the tax and spend clause was recognized, and it was affirmed that states had no authority to interfere with this.
In addition to the powers explicitly stated in the Constitution, Congress also has implied powers that have been assumed to exist. One of Congress's primary powers is the power of the purse, which is a check on the executive branch. The Supreme Court affirmed this power in Helvering v. Davis, where it upheld Social Security as an exercise of Congress's power to spend for the general welfare.
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Frequently asked questions
Article I of the U.S. Constitution establishes a Legislative Branch with a House and Senate, which together form the United States Congress. The Constitution grants Congress the power to:
- Enact legislation and declare war
- Confirm or reject Presidential appointments
- Lay and collect taxes
- Regulate commerce with foreign nations
- Raise and support armies
- Make all laws
- Exercise exclusive legislation in all cases
Congress is responsible for introducing and passing bills, which then go to the President for consideration. Bills can be introduced by anyone, but only members of Congress can introduce legislation. Congress also has the responsibility to:
- Provide for the punishment of counterfeiting
- Promote the progress of science and useful arts
- Define and punish piracies and felonies committed on the high seas
- Exercise like authority over all places purchased by the consent of the legislature
Congress consists of a Senate and a House of Representatives. The Senate has 100 members, with each state represented by two senators. The House of Representatives has 435 elected members, divided among the 50 states in proportion to their total population. There are also 6 non-voting members representing the District of Columbia, Puerto Rico, and four other U.S. territories.

























