As the House and Senate prepared to mark roughly 250 years since the Revolutionary era set the stage for the United States, their long record shows Congress repeatedly functioning as the nation’s primary forum for wrestling with large, often contentious problems. That history is uneven: the chamber has passed landmark laws that reshaped the country while also ceding authority or stumbling amid partisan and institutional strain.
- Congress has repeatedly been the forum where the U.S. tries to solve major problems: revenue, civil rights, social welfare, war powers and institutional norms.
- Income taxes now provide roughly half of federal revenue after a 20th‑century constitutional change; taxes remain highly contested.
- Reconstruction, the Civil Rights and Voting Rights Acts were major congressional interventions that have been revisited and challenged over time.
- Congress created enduring social programs (Social security, Medicare, Medicaid, ACA) that are repeatedly subject to political change.
- War Powers Act of 1973 and recent congressional resolutions illustrate ongoing friction between Congress and the presidency.
Lead: what Congress has tried to do
Congress’s work spans the founding era’s Bill of Rights through modern debates over taxes, civil rights, social welfare, military authority and congressional norms. Observers describe the institution as the place “where we figure out how to live with each other,” a role that is simultaneously vital and frequently messy. The following five threads outline how Congress has repeatedly been the site for national problem‑solving — and where those efforts have succeeded, faltered or been reopened in later conflicts.
1. Raising money: tariffs, income tax and ongoing fights
From the early republic’s reliance on tariffs to handle federal revenue, Congress’s approach to taxation has evolved. In the 20th century lawmakers ratified a constitutional amendment to establish the modern income tax system; what began at a 1% rate has grown into the central source of federal receipts, accounting for roughly half of U.S. revenue, according to tax analysts cited in reporting.
Tax law remains a perennial battleground. Recent congressional action included a large tax‑cut package enacted last year, and debates over tariffs and trade policy have continued into the courts and the executive branch. Those developments show Congress’s role in shaping fiscal policy, even as tax choices remain politically contested and legally litigated.
2. Reconstruction and civil‑rights legislation
Congress exercised broad authority during Reconstruction after the Civil War, passing measures in 1867 that the president at the time repeatedly vetoed; Congress overrode those vetoes and used its powers in a way that led to an impeachment. A century later, Congress enacted the Civil Rights Act of 1964 and the Voting Rights Act of 1965 as sweeping attempts to end legal segregation and protect voting access.
Those achievements have not been permanent settlements. The Supreme Court’s more recent rulings have rolled back parts of the Voting Rights Act, triggering fresh redistricting disputes and challenges to Black‑majority districts in some Southern states. Separately, immigration policy and questions about the 14th Amendment’s guarantees continue to move through courts and political channels, illustrating that congressional settlements can be reopened by later legal and political developments.
3. Social safety nets: Social Security, Medicare, Medicaid and the ACA
Congress’s passage of Social Security in the 1930s established an enduring federal response to elderly poverty; later expansions created Medicare and Medicaid and, in 2010, the Affordable Care Act broadened health coverage again. Roughly two in five Americans now rely on Medicare or Medicaid, while tens of millions receive Social Security benefits and more than 20 million people are enrolled in the ACA, according to reporting on program enrollment figures.
These programs have reshaped expectations about the federal government’s role in social welfare, but they are recurrently subject to political challenge. Republican efforts to repeal and replace the ACA faltered in the past decade, and recent legislative changes have attached new conditions to Medicaid in some cases that advocates say will reduce enrollment. Congress’s choices directly affect program scope, funding and eligibility—making these programs both policy accomplishments and persistent sites of political conflict.
4. War powers and the balance with the presidency
The Constitution divides war authority between Congress and the president, producing a ‘‘twilight zone’’ of shared and overlapping powers. In reaction to protracted involvement in Vietnam, Congress passed the War Powers Act in 1973 to require the president to seek congressional approval for hostilities within a set period. That statute reflects Congress’s effort to reclaim a role in decisions that send Americans into conflict.
In the current era, lawmakers have repeatedly introduced war powers resolutions aimed at curbing unilateral military actions, including measures tied to operations related to Iran, Venezuela and Cuba. Multiple resolutions have been voted on this year without reaching the president’s desk, underscoring limits in Congress’s ability to obtain timely influence over executive military operations even when majorities raise objections.
5. Rules, discipline and congressional tone
Congress also governs its own membership and decorum. From expulsions during the Civil War era to notable Senate censures, the chamber has long used internal sanctions to police conduct. Expulsions, once rare, became more frequent across recent decades, and censure remains an available, if politically fraught, tool.
How Congress sets rules for itself affects public trust and the tone of national politics. Changes in enforcement, disciplinary norms and institution‑level behavior can signal broader shifts in how political disputes are handled inside the halls of government.
Context and implications
Across these five areas, a pattern emerges: Congress often writes consequential laws that alter American life, but those laws and the branch’s authority are not permanent endpoints. Judicial rulings, presidential action, subsequent legislation and shifting political coalitions can narrow, expand or revisit congressional achievements. Recent years have included examples of Congress ceding power to a strong executive and of attempts to reclaim authority through statutes and votes.
For U.S. residents, the practical takeaway is straightforward: congressional elections and the internal workings of the House and Senate tangibly influence taxes, civil rights protections, health coverage, the ability to authorize or constrain military action, and the level of accountability applied to public officials. When Congress is active and assertive, it can pass sweeping reforms; when it is fractured or yields authority, other branches or governments fill the void.
Unresolved questions
- Will ongoing legal challenges and Supreme Court decisions further erode or reshape statutes like the Voting Rights Act and aspects of federal immigration law?
- Can Congress, in practice, restore stronger oversight over military actions short of formal declarations of war?
- How will future Congresses balance fiscal demands, such as revenue needs and program solvency, with competing political pressures over taxes and entitlements?
Timeline: five turning points noted in reporting
- 1789 — First formal convening of the modern House and Senate (historical benchmark for the congressional era).
- 1867 — Passage of Reconstruction legislation amid presidential vetoes and subsequent congressional overrides.
- 1930s–1960s — Creation of Social Security followed by Medicare and Medicaid expansions.
- 1964–1965 — Passage of the Civil Rights Act and Voting Rights Act.
- 1973 — Enactment of the War Powers Act to constrain executive military commitments.
What reporters and scholars say
Philip Wallach of the American Enterprise Institute is quoted in reporting describing Congress as the place to work out how Americans will live together. Tax analysts note that income taxes have become the “workhorse” of federal revenue. At the same time, observers point to erosion of congressional powers when confronted by a powerful executive in recent years, producing renewed debate about the branch’s role.
Bottom line
Congress remains the central — and contested — venue for national problem‑solving. Its record includes landmark achievements that redefined American life and ongoing struggles over authority, effectiveness and political will. As voters and officials look ahead, the shape of future Congresses will determine whether the chamber is able to reclaim or reshape its role in the nation’s pursuit of a more perfect union.
