Unit 2 · Topic 2.3 · about 30 minutes · 7 parts · 11 scored checks, 2 of them multiple choice, plus 2 from earlier lessons
AP U.S. Government and Politics 2.3: Congressional Behavior
Unit 2: 25 to 36% of the multiple-choice section
What you'll be able to do
- Explain how congressional behavior is influenced by election processes, partisanship, and divided government.
Key vocabulary
| Term | What it means | The exam trap |
|---|---|---|
| Trustee | A representative who decides using personal knowledge and judgment. | Look for the member’s stated basis for deciding, rather than the popularity of the outcome. |
| Delegate | A representative who acts as an agent of constituents’ interests. | Constituent input differs from an agreement to follow party leaders. |
| Politico | A representative who combines trustee and delegate approaches. | Different approaches across issues are evidence for a combined role. |
| Partisan voting | Voting based on political party affiliation. | A party-aligned vote does not by itself measure a change in ideological distance. |
| Polarization | Movement of political attitudes toward ideological extremes. | Distinguish ideological distance from the count of parties or a single disagreement. |
| Gridlock | Lack of consensus that prevents congressional action on legislation. | Identify the missing agreement rather than assuming constitutional power is absent. |
| Redistricting | Redrawing electoral district boundaries. | Ask whether boundaries are changing before alleging a particular motive. |
| Gerrymandering | Manipulating district boundaries for political advantage. | Identify evidence about design and purpose rather than relying only on shape. |
| Divided government | Different parties control the presidency and at least one congressional chamber. | Identify control of both institutions before classifying the arrangement. |
| Lame duck president | An outgoing president with an established expectation of leaving office, such as after a successor has been elected. | Look for facts establishing expected departure, rather than timing or approval alone. |
| Equal Protection Clause | The Fourteenth Amendment requirement of equal protection of the laws. | Identify the alleged representation or classification injury. |
| Justiciability | Whether an issue is appropriate for a court to decide. | A decision to hear a claim differs from granting all requested relief. |
Tap to open the picture full sizePart 1 Think first Predict the institutional consequence
Separate party control, member motivations, and the legal authority to act.
Predict first
A member opposes the president’s proposal. Does that vote alone prove divided government?
In short. Party divisions, district design, divided government, and members’ views of representation affect congressional cooperation and accountability.
- Explain how party divisions can block a coalition.
- Distinguish district design from a court’s decision to hear a constitutional claim.
- Use party control and stated decision rules as separate evidence.
Part 2 Learn it Trace party divisions to governing behavior
2a. Trace party divisions to governing behavior
Partisan voting occurs when members vote based on party affiliation. Polarization means political attitudes move toward ideological extremes. These related ideas are not interchangeable: a vote can follow party affiliation without proving that members’ attitudes have moved farther apart over time.
Strong ideological divisions can reduce the common ground needed for legislation. Gridlock occurs when lack of consensus prevents congressional action on legislation. A disagreement or a failed proposal alone does not establish that the institutions lack constitutional authority. Explain the link from divided preferences to difficulty forming a coalition, rather than treating gridlock as a synonym for any slow procedure.
Quick check · Fill the statement
Identify the governing obstacle.
When ideological divisions leave no coalition able to agree on legislation, the resulting concerns a lack of , rather than the absence of Congress’s powers.
2b. Distinguish drawing districts from constitutional review
Redistricting redraws electoral boundaries; gerrymandering manipulates them for political advantage. Unequal representation and districting choices can raise Equal Protection questions. Identify the alleged injury rather than treating an unusual shape alone as a complete constitutional argument.
In Baker v. Carr (1962), Tennessee voters challenged legislative apportionment that had not kept up with population shifts. The majority held the Equal Protection claim justiciable. Familiar, judicially manageable standards allowed courts to examine alleged discrimination despite political consequences. This opened a judicial route; it did not prescribe every later map.
In Shaw v. Reno (1993), voters challenged North Carolina’s congressional plan with majority-minority districts. The majority recognized a claim alleging a plan so irrational on its face that racial separation alone explained it without sufficient justification. If uncontradicted, those allegations required the lower court to examine whether the plan was narrowly tailored to a compelling governmental interest. The Court remanded for that inquiry, rather than finally invalidating every majority-minority district.
Compare the majority reasoning: Baker identifies manageable standards for hearing a representation claim; Shaw requires examination of an alleged racial classification and its justification. Primary opinions: Baker v. Carr, U.S. Reports and Shaw v. Reno, U.S. Reports.
Quick check · Fill the statement
Distinguish review from a new map.
Baker v. Carr allowed federal courts to hear an challenge to representation; this concerns , not an immediate judicial design for every district.
2c. Combine institutional incentives and representation roles
Divided government exists when one party controls the presidency and the other controls at least one congressional chamber. This can intensify partisan opposition to a president’s initiatives and appointments. Opposition can be especially strong for an outgoing lame duck president, such as one serving the remaining period after a successor has been elected. Divided government describes party control, not a president’s popularity or the separation of powers by itself. Nearing an ordinary term-end date is not enough to establish lame-duck status if the president may continue in office.
Members also differ in how they understand accountability. A trustee uses personal knowledge and judgment to decide. A delegate acts on constituents’ interests as their agent. A politico combines the approaches depending on the issue. A member can take a trustee approach on one issue and a delegate approach on another; the behavior, not party membership alone, establishes the role.
To explain a vote, separate evidence about party competition, electoral incentives, and the member’s stated role. A vote against a president may reflect several factors. Name what the prompt actually establishes rather than assuming one institutional condition supplies the entire explanation.
Quick check · Fill the statement
Use the stated decision rule.
A member follows constituents’ interests on a local bill as a , but relies on personal judgment on another issue as a . The combination illustrates a politico approach.
Part 3 Watch it done Explain an incomplete coalition
A fictional committee has the constitutional authority to act, but party groups with increasingly distant positions cannot agree on a compromise bill. An observer says the problem must be a lack of legislative power.
Step 1 · Separate authority from agreement
The prompt explicitly provides legislative authority. The remaining evidence concerns the positions of members and their willingness to cooperate.
Why this step?
What evidence supports an explanation based on party division?
The groups’ positions are increasingly distant and no compromise coalition forms. That links ideological division to the governing obstacle.
Step 2 · Name the effect precisely
Decide whether the obstacle concerns an institution’s legal power or its members’ ability to form sufficient agreement.
Your step · Decide and justify
Which explanation best fits the obstacle?
Which institutional reason supports the decision?
A contrasting worked example
The presidency and House majority belong to Party A; the Senate majority belongs to Party B. This is divided government because the other party controls at least one chamber. Opposition to appointments may intensify, but the control arrangement does not prove how every senator votes. By contrast, one party controlling all three institutions would not meet this definition.
Part 4 Try it Classify the institutional action
Original teaching situations: distinguish what each institution can do.
Try it · Sort it
Which view of representation does the stated decision rule illustrate?
Trustee
Delegate
Politico
Try it · Fill the statement
Apply the institutional distinction.
Party A controls the presidency and House; Party B controls the Senate. The arrangement is government. After a successor is elected, the outgoing president serves the remaining period as a .
Try it · Fill the statement
Use the evidence about behavior and ideological change.
A member votes based on party affiliation, illustrating . Separate evidence that attitudes move toward ideological extremes establishes , which can reduce common ground and contribute to .
Part 5 Explain it Compare a new representation case
Free response is 50% of the exam score. This one is shaped like Question 3, SCOTUS Comparison.
Free-response practice · Question 3 style
Original SCOTUS-comparison practice: a supplied hypothetical says voters challenge a state legislative map because unequal populations dilute their representation. A lower federal court refuses to hear the Equal Protection claim solely because districting is political. (A) Identify the clause shared with Baker v. Carr. (B) Explain a similarity in the legal problem and how Baker’s holding relates to the refusal to hear the claim. (C) Explain how judicial access can affect the political process without guaranteeing the voters a particular map.
Model answer
The shared provision is the Equal Protection Clause of the Fourteenth Amendment. Both involve a representation challenge and the question whether a federal court may consider it. Baker held that the Equal Protection claim was justiciable, so dismissing the supplied claim solely because districting is political conflicts with that judicial-access reasoning. Access lets voters seek judicial protection outside the legislature, but a decision to hear the case does not automatically grant a specific district map. The majority’s reasoning matters: familiar Equal Protection standards supplied a manageable judicial inquiry, so political consequences alone did not bar consideration.
Score your own answer. This is a self-check, not a grade. Tick each point your answer makes.
Part 6 Check yourself Compare two routes to districting review
These are teaching summaries of the required cases, not quotations or a record of current district litigation.
| Case | Constitutional question | Procedural result |
|---|---|---|
| Baker v. Carr | Population-related representation challenge under Equal Protection | Federal courts may hear the claim |
| Shaw v. Reno | Districting alleged to separate voters by race without sufficient justification | Equal Protection claim requires judicial examination |
Case question 1 · Multiple choice
What constitutional relationship do the cases share?
Case question 2 · Multiple choice
A lower court finds the alleged racial separation in the Shaw summary uncontradicted. Which inquiry follows the majority’s reasoning?
The rest stand on their own and do not use the case.
Check yourself · Spot the error
Select the statement that makes an institutional error.
Check yourself · Match
Match each term to its distinguishing institutional feature.
Part 7 Keep it Retrieve and connect
From 2.1 Congress: The Senate and the House of Representatives · Fill the statement
Compare election exposure.
At a regular two-year election, House seats and roughly Senate seats are scheduled for election.
From 2.2 Structures, Powers, and Functions of Congress · Fill the statement
Read the bargaining evidence.
Two legislators agree to support each other’s proposals. The exchange is , while a separately described local project in a larger appropriation is .
In three lines
- Explain how party divisions can block a coalition.
- Distinguish district design from a court’s decision to hear a constitutional claim.
- Use party control and stated decision rules as separate evidence.
Exam strategy for this topic
- Section I, Multiple Choice: 55 questions in 80 minutes.
- Section II, Free Response: 4 questions in 100 minutes.
- This lesson's Explain it is shaped like free-response question 3, SCOTUS Comparison.
Separate party control, member motivations, and the legal authority to act.
Questions students ask
Does partisan voting prove polarization?
Not by itself. Partisan voting describes the basis of a vote; polarization describes movement toward ideological extremes. Additional evidence is needed to establish that movement.
What did Baker open to federal courts?
A judicial route for Equal Protection challenges to representation. A justiciability holding permits consideration of a claim rather than prescribing every remedy.
Does every majority-minority district violate Equal Protection?
No. Shaw permits constitutional examination of the alleged racial classification described in the case. Identify the role of race and the claimed justification rather than assuming the district’s composition alone decides legality.
How can divided government affect a lame duck president?
Opposition-party control of a chamber can intensify resistance to initiatives and appointments while a president is outgoing, for example after a successor has been elected. An approaching term date or low approval alone does not establish that condition.
Course alignment, for teachers
AP U.S. Government and Politics topic 2.3, Unit 2: Interactions Among Branches of Government.
- Skill 2.A: Describe the facts, issue, holding, reasoning, decision, and majority opinion of required Supreme Court cases.
This lesson maps all 4 essential knowledge statements of the topic to the part that teaches each one: 4 are checked by a scored question. The map is in the lesson file.