2.3 Congressional Behavior

TLDR

Congressional behavior is shaped by elections, partisanship, and divided government. Members vote based on party loyalty, personal judgment, or constituent demands, and those choices connect to trustee, delegate, or politico models of representation.

AP Gov 2.3 Congressional Behavior

AP Gov 2.3 explains why members of Congress vote and act the way they do. The biggest factors are election incentives, party pressure, divided government, and a member's model of representation: trustee, delegate, or politico.

The exam often tests this topic through scenarios. If a member votes based on constituent opinion, think delegate. If they use personal judgment, think trustee. If the scenario involves redistricting, connect Baker v. Carr to one person, one vote and Shaw v. Reno to racial gerrymandering under the Equal Protection Clause.

Why This Matters for the AP Gov Exam

This topic explains why Congress sometimes acts quickly and other times stalls completely. You will use these ideas to analyze partisan voting, polarization, and gridlock in multiple-choice questions and free-response scenarios.

Baker v. Carr and Shaw v. Reno are both required Supreme Court cases, so they can appear in the SCOTUS Comparison FRQ. You can also bring representation models and divided government into concept application questions about how members of Congress make decisions.

Key Takeaways

• Members of Congress represent constituents as trustees, delegates, or politicos, and many shift between these roles depending on the issue.
• Partisan voting and polarization push parties toward ideological extremes, which can produce gridlock.
• Divided government often increases conflict over legislation and presidential appointments, especially for a lame duck president.
• Gerrymandering uses packing and cracking to create uncompetitive districts that affect representation.
• Baker v. Carr made redistricting a question federal courts could decide and established one person, one vote.
• Shaw v. Reno ruled that districts drawn mainly on race face strict scrutiny under the Equal Protection Clause.

Models of Representation

Members of Congress decide how to vote based on how they see their job. These models explain why legislators sometimes follow their voters and other times follow their own judgment.

Delegate Model

A representative acting as a delegate sees themselves as an agent of the people who elected them. They vote based on what their constituents want, even if it differs from their personal view.

Example: A House member from a farming district supports agricultural subsidies because most constituents depend on farming.

Trustee Model

A representative acting as a trustee votes based on their own knowledge and judgment, even when it goes against popular opinion at home.

Example: A senator votes for environmental regulations they believe are best for the country, despite opposition in their state.

Politico Model

A politico combines both approaches. They act like a delegate when public opinion is strong and clear, but rely on their own judgment on lower-profile or procedural votes.

These roles are not fixed. The same member can switch between them depending on the issue and political situation.

Partisanship and Divided Government

Ideological Divisions and Gridlock

As parties have become more ideologically polarized, partisan voting has increased. Partisan voting means members vote based on their party rather than seeking compromise.

When divisions get strong enough, Congress can reach gridlock, where no legislation moves forward because there is no consensus.

Divided Government

Divided government happens when one party controls the presidency while the other party controls at least one chamber of Congress.

This situation often leads to:

• More partisan conflict over legislation and nominations
• Members voting against presidential initiatives and appointments
• Slower action on appointments, especially for a lame duck president

A lame duck president is one nearing the end of their term, often after losing reelection or hitting term limits, who tends to face stronger resistance from Congress.

The Electoral Connection and Constituent Services

Representatives do more than vote on laws. They also perform casework and stay visible in their districts to keep constituent support.

Common ways members serve constituents include:

• Helping people navigate federal agencies like Social Security or the VA
• Connecting voters to scholarships, internships, or federal opportunities
• Gathering feedback from the district
• Responding to local crises with federal support

This daily work builds trust and helps reelection. House members serve two-year terms, so they often stay more responsive to constituents than senators, who serve six-year terms. The electoral timeline shapes how sensitive members are to constituent demands.

Redistricting, Gerrymandering, and Representation

Every 10 years, the census counts the population, and congressional district lines are redrawn to reflect population shifts. This process is called redistricting, and it shapes representation and congressional behavior.

Gerrymandering

Gerrymandering is drawing district boundaries to favor a party or group. Two common tactics are:

• Packing: concentrating the opposition into a few districts
• Cracking: spreading the opposition thinly across many districts

These tactics can create uncompetitive districts, push polarization further, and lead to lawsuits over unequal representation.

Required Supreme Court Cases on Redistricting

Baker v. Carr and Shaw v. Reno both shaped how courts limit redistricting, and both rely on the Equal Protection Clause of the 14th Amendment.

Baker v. Carr (1962)

Issue: Tennessee had not redrawn its state legislative districts since 1901 despite major population shifts. Urban districts were badly underrepresented compared to rural ones, diluting city residents' votes.

Decision: The Supreme Court ruled that redistricting was justiciable, meaning federal courts could hear and decide cases about legislative apportionment. This broke from the earlier view that redistricting was a political question outside the reach of judicial review.

Key idea: One person, one vote, meaning legislative districts must be roughly equal in population so each vote carries similar weight.

Why it matters for AP Gov:

• Opened the door for equal protection challenges to redistricting
• Expanded the role of federal courts in reviewing redistricting
• Useful in the SCOTUS Comparison FRQ on voting rights, judicial power, or district representation

Shaw v. Reno (1993)

Issue: North Carolina created a majority-minority congressional district that was oddly shaped and appeared to be drawn primarily based on race. Voters challenged it as racial gerrymandering that violated the Equal Protection Clause.

Decision: The Court ruled that districts drawn predominantly based on race are subject to strict scrutiny under the Equal Protection Clause. Race can be one factor in redistricting, but it cannot be the main factor.

Key idea: Racial gerrymandering is unconstitutional unless it serves a compelling state interest and is narrowly tailored.

Why it matters for AP Gov:

• Shows the limits of using race in drawing districts
• Connects to debates about civil rights and the role of the judiciary in protecting minority rights
• Useful in FRQs about redistricting, the Equal Protection Clause, or judicial review

Baker v. Carr vs. Shaw v. Reno

How to Use This on the AP Gov Exam

These are the most common ways this topic shows up, not every possible question type.

MCQ

Expect questions that ask you to connect partisan voting, polarization, and gridlock, or to identify how divided government affects appointments and legislation. You may also need to match a voting decision to the trustee, delegate, or politico model.

FRQ 1: Concept Application

A scenario might describe a member of Congress facing pressure from their party and their district. Be ready to apply representation models, partisanship, or divided government to explain the behavior.

FRQ 3: SCOTUS Comparison

Baker v. Carr and Shaw v. Reno are both required cases that can serve as the required case in this FRQ. Use Baker v. Carr for voting equality and judicial power, and Shaw v. Reno for limits on race-based districting. Tie your comparison to the Equal Protection Clause.

Common Trap

Do not assume divided government always means total gridlock. It raises conflict and slows some action, but laws can still pass. Also be careful to keep the two cases straight: Baker v. Carr is about whether courts can hear redistricting cases, while Shaw v. Reno is about race in drawing districts.

Common Misconceptions

• Trustee, delegate, and politico are not permanent labels. The same member can act as a delegate on a high-profile vote and as a trustee on a procedural one.
• Polarization and gridlock are not the same thing. Polarization is parties moving toward ideological extremes; gridlock is the resulting inability to pass legislation.
• Gerrymandering is not automatically illegal. Baker v. Carr and Shaw v. Reno set limits, but partisan line-drawing still happens within those limits.
• Shaw v. Reno did not ban all majority-minority districts. It said race cannot be the predominant factor without surviving strict scrutiny.
• A lame duck president still holds full constitutional powers. The "lame duck" label describes reduced political leverage, not a loss of formal authority.

Related AP Gov Guides

• 2.1 Congress: The Senate and the House of Representatives
• 2.2 Structures, Powers, and Functions of Congress
• Unit 2 Overview: Interactions Among Branches of Government
• 2.4 Roles and Power of the President
• 2.12 The Bureaucracy
• 2.8 The Judicial Branch