Lesson 07: Congress — Structure & Powers

Starter

In 2021, a single senator could keep the entire Senate from voting on a bill simply by objecting — forcing the majority to find 60 votes just to start debating it. Meanwhile, over in the House, the majority party can schedule a bill, limit debate to one hour, ban amendments, and pass it the same afternoon.

Same Congress. Same Constitution. Two completely different machines.

That is not an accident — it is design. The Framers built two chambers on purpose, gave them different sizes, different term lengths, and different jobs, and then forced them to agree before anything becomes law. Understanding Congress is mostly understanding why the two halves are different and how a bill survives the gauntlet between them.

Today is about process, not personalities. The AP exam will not ask whether a law was good. It will ask: Which chamber? Which power? Which clause? What happens next? Learn the machine, and those questions answer themselves.

Core Concepts

Congress is the bicameral (two-chamber) legislature created by Article I of the Constitution — the longest article, listed first, because the Framers expected the legislature to be the most powerful branch. The two chambers, the House of Representatives and the Senate, share the lawmaking power but differ in almost every other respect. Those differences are the heart of Unit 2.

The House vs. the Senate

The Framers split Congress at the Constitutional Convention through the Great Compromise: the House represents people (apportioned by population), the Senate represents states (two per state, equal). Everything else flows from that.

Because House members face voters every 2 years and represent smaller districts, they tend to be more responsive to short-term public opinion and more tightly controlled by party leadership. Senators, with 6-year staggered terms and statewide constituencies, are more insulated from momentary swings and operate with more individual independence.

Floor procedure is the sharpest contrast. In the 435-member House, debate must be rationed, so the House Rules Committee acts as a traffic cop: it issues a "rule" for each major bill setting how long debate runs and whether amendments are allowed (a "closed rule" bans them). This lets the majority move legislation quickly and on its own terms.

The Senate has no such bottleneck. By tradition, a senator may speak indefinitely — the filibuster — to delay or block a vote. To end debate, the Senate must invoke cloture, which requires 60 votes (three-fifths of the full Senate) for most legislation. Because the minority can force the majority to find 60 votes, the Senate's practical threshold for passing controversial bills is often 60, not a simple majority of 51.

Unique Powers of Each Chamber

Most powers are shared — a bill must pass both chambers in identical form. But the Constitution hands each chamber a few exclusive jobs. These are heavily tested.

The House alone: - Originates revenue (tax) bills — the Origination Clause, Article I, Section 7, Clause 1: "All Bills for raising Revenue shall originate in the House." - Impeaches federal officials — brings the formal charges (Article I, Section 2, Clause 5). Impeachment is an accusation, like an indictment, by simple majority. - Chooses the president if no candidate wins an Electoral College majority (12th Amendment).

The Senate alone: - Confirms presidential appointments — federal judges, Cabinet officers, ambassadors — by simple majority (Article II, Section 2, Clause 2). - Ratifies treaties by a two-thirds vote (Article II, Section 2, Clause 2). - Tries impeachments — holds the trial after the House impeaches; conviction and removal require a two-thirds vote (Article I, Section 3, Clauses 6–7).

A memory anchor: the House accuses, the Senate confirms/tries/ratifies. Revenue and impeachment start in the House; appointments, treaties, and impeachment trials live in the Senate.

Leadership

Party organization runs both chambers.

• Speaker of the House — the only congressional leader named in the Constitution (Article I, Section 2, Clause 5). Elected by the full House, the Speaker is the leader of the majority party, controls the legislative agenda and committee referrals, and is second in the line of presidential succession (after the VP).
• House Majority and Minority Leaders — floor leaders for each party; the majority leader schedules legislation, the minority leader leads the opposition.
• Whips (both chambers) — count votes and "whip" party members into line on key votes.
• President of the Senate — the Vice President of the United States (Article I, Section 3, Clause 4). The VP presides but votes only to break a tie.
• President pro tempore — presides in the VP's absence (Article I, Section 3, Clause 5); by custom, the most senior senator of the majority party. Largely ceremonial.
• Senate Majority and Minority Leaders — the real power in the Senate; the majority leader controls the floor schedule.

Enumerated and Implied Powers

The powers of Congress are enumerated (specifically listed) in Article I, Section 8. Know the headline list:

• Lay and collect taxes (cl. 1) — and the spending power
• Borrow money on the credit of the United States (cl. 2)
• Regulate commerce with foreign nations and among the several states — the Commerce Clause (cl. 3)
• Establish naturalization and bankruptcy rules (cl. 4)
• Coin money (cl. 5)
• Establish post offices (cl. 7)
• Declare war (cl. 11)
• Raise and support armies and provide and maintain a navy (cl. 12–13)

The list closes with the most important clause of all — the Necessary and Proper Clause (also called the Elastic Clause), Article I, Section 8, Clause 18: Congress may "make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers." This clause is the source of implied powers — powers not listed but reasonably needed to carry out the enumerated ones. McCulloch v. Maryland (1819) read it broadly to uphold the national bank.

The Power of the Purse

Among all these, the power of the purse is the most consequential check Congress holds. Article I, Section 9, Clause 7 states that "No Money shall be drawn from the Treasury, but in Consequence of Appropriations made by Law." Translation: the executive branch cannot spend a dollar Congress has not appropriated. This is how Congress funds (or defunds) wars, agencies, and programs — and the leverage behind every government-shutdown standoff.

The Legislative Process

A bill becomes law only by surviving a long obstacle course. The order matters on the exam:

Introduction → Committee → Markup → Floor → the other chamber (repeat) → Conference Committee → the President.

1. Introduction — a member introduces the bill in either chamber (except revenue bills, which start in the House).
2. Committee — the bill is referred to a standing committee; most bills die here, never receiving a hearing.
3. Markup — the committee debates, amends, and rewrites the bill, then votes to report it out (or kills it).
4. Floor — the full chamber debates and votes. In the House, the Rules Committee sets the terms; in the Senate, a filibuster may require cloture (60 votes) to proceed.
5. The other chamber — the bill repeats the entire process in the second chamber.
6. Conference committee — if the two chambers pass different versions, a temporary conference committee of members from both chambers reconciles them into one text, which both chambers must then re-pass.
7. The President — signs it into law, vetoes it (Congress may override with two-thirds of both chambers), or takes no action (it becomes law in 10 days, or dies by pocket veto if Congress has adjourned).

The Committee System

Most of Congress's real work happens in committees, not on the floor. Committees screen the thousands of bills introduced each session, hold hearings, and shape legislation. There are four types:

• Standing committees — permanent, subject-area committees (e.g., Judiciary, Armed Services) that handle most legislation.
• Select committees — temporary, created for a specific investigation or purpose.
• Joint committees — include members of both chambers; usually for study or oversight, not lawmaking.
• Conference committees — temporary joint committees that reconcile House and Senate versions of a bill.

Committees are powerful because they are gatekeepers: a committee chair can refuse to schedule a hearing and quietly kill a bill before the full chamber ever sees it. Control of committees follows control of the chamber — the majority party holds every chairmanship.

In Practice

When a major bill "fails," it usually didn't lose a final vote — it died earlier. It may have been buried in committee, blocked by a filibuster requiring 60 votes the majority couldn't find, or passed by one chamber and ignored by the other. On the exam, identifying where in the process a bill stalls (committee gatekeeping vs. filibuster vs. bicameral disagreement) is exactly the kind of "process over outcome" analysis that earns points.

Document Spotlight — The Constitution, Article I

Context. Article I is the first and longest article of the Constitution, ratified in 1788. The Framers placed the legislature first deliberately: in a republic built on consent, the branch closest to the people should be the primary lawmaker. Article I both structures Congress (Sections 1–6) and empowers and limits it (Sections 7–10).

Authentic language. - On structure: "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." (Section 1) - On enumerated power: "The Congress shall have Power To lay and collect Taxes... To regulate Commerce... among the several States... To declare War." (Section 8) - On implied power: Congress may "make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers." (Section 8, Clause 18)

What it means. "Herein granted" is the key phrase: Congress has only the powers the Constitution grants, not unlimited authority — the principle of limited government and enumerated powers. But the Necessary and Proper Clause stretches that grant, letting Congress choose the means to carry out its listed ends. The result is a legislature that is powerful but bounded — broad enough to govern a growing nation (McCulloch), yet still subject to limits (Lopez).

How it's used on the AP exam. Article I is the go-to citation for any question about congressional power, federalism, or the legislative process. In an FRQ, don't write "the Constitution gives Congress power" — name the clause: "Article I, Section 8 enumerates the power to regulate interstate commerce, and Clause 18 (Necessary and Proper) lets Congress implement it." Precision earns the point; vagueness does not.

SCOTUS Case Breakdown

The two SCOTUS cases most associated with Congress's representation and districting — Baker v. Carr (1962, "one person, one vote") and Shaw v. Reno (1993, racial gerrymandering) — belong to Lesson 8: Congress — Behavior & Representation, where redistricting is the central theme. They are introduced there in full. For congressional power, the controlling cases are McCulloch v. Maryland (Necessary and Proper Clause) and United States v. Lopez (limits on the Commerce Clause), both covered in Lessons 5 and 6. This lesson focuses on structure and process; no new case is introduced here.

Application Practice

Scenario 1. A bill to fund national infrastructure passes the House by a simple majority. In the Senate, it has the support of 54 senators, but the minority refuses to allow a final vote and the majority cannot move forward.

• Issue: the Senate filibuster and cloture.
• Principle: the Senate has no Rules Committee to limit debate; a minority can filibuster, and ending debate requires cloture — 60 votes.
• Apply: 54 votes is a majority but short of the 60 needed for cloture, so the bill stalls despite majority support.
• Predict: the bill fails to advance unless supporters find 6 more votes or attach it to a vehicle that bypasses the filibuster. The lesson: in the Senate, a majority is often not enough.

Scenario 2. The president negotiates a trade treaty with three other nations. The president argues it should take effect immediately as an executive action.

• Issue: the treaty power.
• Principle: under Article II, Section 2, Clause 2, treaties require the advice and consent of the Senate by a two-thirds vote.
• Apply: the president cannot unilaterally give a treaty legal force; the Senate must ratify it by two-thirds.
• Predict: without two-thirds Senate approval, the treaty is not ratified. (A president may sometimes use an "executive agreement" instead — that's the informal workaround, but a true treaty needs the Senate.)

Scenario 3. A popular bill is introduced in the House, but the chair of the standing committee it is referred to opposes it and never schedules a hearing. The bill never reaches the floor.

• Issue: committee gatekeeping.
• Principle: most bills die in committee; a chair controls whether a bill gets a hearing.
• Apply: even with broad support, a bill the committee chair refuses to schedule cannot advance.
• Predict: the bill dies in committee. To revive it, supporters would need an extraordinary maneuver (e.g., a House discharge petition) — but ordinarily, the gatekeeper wins.

Traps & Confusions

House vs. Senate unique powers. A reliable mix-up. The House originates revenue bills and impeaches (accuses). The Senate confirms appointments, ratifies treaties (two-thirds), and tries impeachments (conviction needs two-thirds). If a question involves money starting or an accusation, think House; if it involves approving people, treaties, or holding the trial, think Senate.

Standing vs. conference committees. Standing committees are permanent and handle most legislation by subject area. Conference committees are temporary and exist only to reconcile differing House and Senate versions of one bill. Don't confuse the everyday workhorse (standing) with the one-time reconciler (conference).

Enumerated vs. implied vs. inherent powers. Enumerated = explicitly listed in Article I, Section 8 (tax, declare war, regulate commerce). Implied = not listed but justified by the Necessary and Proper Clause (e.g., the national bank). Inherent powers belong to the national government simply because it is a sovereign nation (mostly foreign-affairs powers) — these are not the same as implied powers.

Filibuster vs. cloture. The filibuster is the delay tactic (talking a bill to death); cloture is the cure — the 60-vote motion that ends debate. They are opposites, not synonyms. And both are Senate tools; the House has the Rules Committee instead.

Practice Problems

Questions 11–12 refer to the table below.

Selected Differences Between the House and the Senate

FRQ Practice — Concept Application (FRQ 1)

Concept Application (FRQ 1) gives you a short scenario and asks you to apply course concepts to it. It is not an essay — answer in clear, separate sentences, one part at a time. Each part is usually worth 1 point, for 3 points total. The single most common mistake is describing what happened instead of explaining the constitutional mechanism — process over outcome.

The Prompt

A senator from the majority party introduces a bill to fund a new national program. The bill passes the relevant House committee, is reported to the House floor, and the House passes it by a simple majority. In the Senate, 55 senators support the bill, but a group of senators from the minority party announces they will hold the floor and refuse to allow a final vote. The majority leader cannot move the bill forward, and it does not become law during the session.

A. Describe the Senate procedure the minority senators are using to block the bill.

B. Explain how the Senate could overcome this procedure, and why the majority was unable to do so in this scenario.

C. Explain how this scenario illustrates a key structural difference between the House and the Senate.

Model Response

Part A (1 pt). The minority senators are using a filibuster — the Senate practice of extending debate indefinitely to prevent a final vote on the bill. Because the Senate traditionally allows unlimited debate, a determined minority can hold the floor and stall legislation.

Part B (1 pt). The Senate can overcome a filibuster by invoking cloture, a motion to end debate that requires 60 votes (three-fifths of the Senate). In this scenario, only 55 senators support the bill — a majority, but fewer than the 60 votes needed for cloture — so the majority cannot end the filibuster and force a final vote, and the bill stalls.

Part C (1 pt). This illustrates that the Senate gives far more power to individual members and the minority than the House does. The House limits debate through the Rules Committee, so a simple majority can pass legislation quickly; the Senate's unlimited debate and 60-vote cloture threshold mean a minority can block bills that command a simple majority. The chamber's smaller size, longer terms, and tradition of unlimited debate make it more deliberative and less majoritarian than the House.

Point Allocation

Common Point-Loss

• Naming without explaining (Part A). Writing "the senators are stalling" without naming the filibuster may not earn the point. Use the term.
• Wrong threshold (Part B). Saying cloture needs two-thirds, or a simple majority, loses the point. It is 60 votes (three-fifths). And you must connect the number to the scenario: 55 is short of 60.
• Describing instead of explaining (Part C). "The Senate is different from the House" is too vague. Name a specific structural difference (debate rules, size, terms) and tie it to behavior.
• Drifting into opinion. The scenario does not ask whether the filibuster is good policy. Stay on the mechanism.