Voting rights expanded from 6% of Americans in 1789 to nearly all adult citizens today.

The 19th Amendment, which granted women the right to vote in the United States, was a culmination of over 70 years of organizing and advocacy.

The 15th Amendment granted Black men the right to vote nationwide

Ratified in 1870, the 15th Amendment prohibited federal and state governments from denying the right to vote based on race, color, or previous condition of servitude—enfranchising millions of Black men.

Early American citizenship was defined inconsistently by individual states.

How Americans have voted throughout history

From shouting candidates’ names, to hanging chads to electronic scanning, the nature of voting has a long, sometimes bumpy history in the United States. See descriptions and images in chronological order with this digestible timeline.

Ratified in 1868, the 14th Amendment guaranteed citizenship to all people born in the United States and required states to provide equal legal protection to all.

Southern states enacted voting restrictions aimed at circumventing Reconstruction

After 1877, former Confederate states passed poll taxes, literacy tests, property requirements, and grandfather clauses to disenfranchise Black voters—restrictions that remained in place for nearly a century until the Voting Rights Act of 1965.

Native Americans were not granted US citizenship until 1924

The Indian Citizenship Act granted citizenship to all Native Americans born in the US, more than 130 years after the Constitution's ratification. Even then, some states continued to deny Native Americans the right to vote for decades.

The Voting Rights Act expanded the DOJ's power to enforce voting protections

The Voting Rights Act of 1965 expanded the Department of Justice's power to challenge discriminatory election laws, send federal examiners, and supervise voting changes in areas with histories of voter suppression—although some of these powers have been limited by court rulings since then.

The Reconstruction Amendments aimed to rebuild the nation and secure freedom after slavery

Ratified between 1865 and 1870 after the conclusion of the war, the 13th, 14th, and 15th Amendments abolished slavery, guaranteed citizenship and equal protection, and extended voting rights to Black men—transforming the Constitution's definition of liberty and equality.

The Voting Rights Act reshaped federal protection of voting rights

Signed into law in 1965, the Voting Rights Act aimed to end racial discrimination in voting. This resource traces its creation and explains how later court rulings have weakened its enforcement power over time.

Abraham Lincoln received only 40% of the popular vote in the 1860 election, highlighting the deep divisions in the country on the eve of the Civil War.

A majority of Americans support replacing the Electoral College with a popular vote.

The Nationality Act of 1790 restricted new citizenship to 'free white persons'

The first federal citizenship law limited naturalization to white immigrants, excluding enslaved people, Indigenous communities, and most non-Europeans.

Black Americans were systematically excluded from juries for much of US history

Literacy tests, poll taxes, and even explicit laws kept Black Americans off juries until well into the 20th century. The Jury Selection and Service Act of 1968 mandated that federal juries reflect a fair cross-section of the community, though racial disparities in jury selection persist.

Most Americans support age limits for justices, elected officials

As members of Congress and Supreme Court justices continue to serve at an average age far older than in the past, polls show a majority of Americans favor setting an age limit for these roles. Roughly 79% support caps for federal elected officials, and 74% favor such limits for Supreme Court justices. A constitutional amendment would be required.

Thousands of state voting changes have been federally blocked since the Voting Rights Act

Since 1965, federal oversight has blocked thousands of state-level voting changes—including redistricting plans—by requiring approval for measures that could affect minority representation, a process scaled back by the Supreme Court in 2013.

How demographics influence voter turnout and elections

This article breaks down demographic data to show what it means for American elections. According to the latest US Census, the US is growing increasingly diverse. As the population becomes more diverse, so does the electorate. Analyzing the...

James Madison wrote the first draft of the Bill of Rights

Madison drafted the initial set of constitutional amendments in 1789. The House approved 17 amendments; the Senate reduced them to 12; and 10 were ratified as the Bill of Rights. One rejected amendment was later ratified in 1992 as the 27th Amendment.

3 states did not officially ratify the Bill of Rights until 1939

Massachusetts, Connecticut, and Georgia originally rejected or tabled the amendments in 1791. With Virginia's ratification already clearing the three-fourths threshold of adoption, there was no legal pressure to revisit it—until all three states acted symbolically on the 150th anniversary of Congressional approval of the amendments.

The 14th Amendment aimed to guarantee citizenship for formerly enslaved people

The 14th Amendment was crafted to overturn Dred Scott by granting birthright citizenship to formerly enslaved people and their descendants, securing their legal status under federal law.

Thousands of Black men held local, state, and federal offices during Reconstruction

Between 1865 and 1877, more than 1,500 Black Americans served in local, state, and federal offices—including 16 in Congress. This unprecedented political participation largely ended after Reconstruction as Jim Crow laws and racial violence suppressed Black voting.

See the results of all 59 presidential elections from 1789 to 2024

This interactive tool lets users explore the outcomes of every US presidential election from George Washington's uncontested 1789 victory through 2024, showing how electoral votes, state results, and shifting coalitions shaped each race.

The Bill of Rights was designed to protect individuals from the power of the federal government

When the Bill of Rights was ratified in 1791, its protections applied only to the federal government. It wasn't until the 14th Amendment (1868) and the Supreme Court's doctrine of selective incorporation that most provisions were extended to state governments—a process that began in 1925.

Understand the US electorate demographics

Ever wonder how much of each group make up the American voting bloc? Find raw data from the '16 and '18 elections broken out by a variety of factors (click on "validated voters database" link).

Voting by mail is safe and secure, and used by voters of both political parties.

Read an annotated 1866 essay by abolitionist Frederick Douglass, where he laid out his vision for reshaping America after the Civil War.

Over a century ago, fewer than 1% of Americans paid income taxes—but the cost of World War II prompted the federal government to greatly expand the number of people required to pay income taxes.

Congress selected the president in 1801 and 1825

In a contingent election, the United States House of Representatives is constitutionally required to choose the president, with each state delegation casting one vote when no candidate secures a majority of the electoral votes.

James Madison's original draft of the First Amendment was far more expansive than what was ratified

Madison's first proposed language guaranteed the right "to speak, to write, or to publish" one's sentiments freely—broader and more explicit than the final text—and described the free press as "one of the great bulwarks of liberty."

Visually explore the federal government's evolving role in education.

US westward expansion—and the status of slavery in the new territories—was a major cause of the American Civil War

The addition of new western lands forced the nation to confront whether slavery would spread beyond the South. Each debate over the admission of a new state sharpened the divide between free and slaveholding regions.

Trace how the Bill of Rights, inspired by centuries of political theory, took shape between 1774 and 1789.

This interactive resource from the National Constitution Center traces the complex drafting process behind the Bill of Rights, showing how state proposals and revisions evolved into the first 10 amendments.

Explore a comprehensive archive of US presidential election data

This University of California, Santa Barbara archive compiles presidential election data from 1789 to the present, including popular vote totals, turnout figures, and contextual resources that explain how the electoral process and political landscape have evolved.

The 2020 and 2024 elections ranked among the highest-turnout contests in over a century

Voter turnout reached 66% in 2020—the highest since 1908—and 64% in 2024, tied for second-highest with 1960. In 2024, Trump benefited from higher turnout among his prior voters and new voters.

The power and influence of the American presidency have expanded significantly over time—far beyond what the founders envisioned.

What impact did WWI have on the US civil rights movement?

One of the great hypocrisies in American history involve the expectation of African-Americans to defend liberty in several wars while being deprived of it when they returned home to, as this article puts it "disfranchisement, segregation, debt peonage and racial violence." The writer reflects on World War I and how it affected the fight for civil rights in the USA.

America's demographic change in one chart

From 1901 to 2020, the US population has changed significantly. This video reveals the change in America’s demographics over more than 100 years.

The 1783 peace treaty with Britain formally ended the Revolutionary War and nearly doubled the size of the United States.

The Dred Scott decision denied citizenship to people of African descent

In 1857, the Supreme Court ruled in Dred Scott v. Sandford that Black Americans could not be US citizens. The decision heightened an already brewing conflict and became a key factor in pushing the nation toward civil war.

The 22nd Amendment was a reaction to Roosevelt's four terms

After Franklin D. Roosevelt won four elections, Congress moved to prevent future presidents from holding power indefinitely. Ratified in 1951, the 22nd Amendment set a firm two-term limit as a safeguard against extended presidencies.

The Electoral College is the system the United States uses to elect its president, allocating 538 electors across the states rather than relying on a single national vote.

The US officially adopted an income tax in 1913

The US first levied income taxes during the Civil War, but modern income taxes became an American fixture in 1913. Two years earlier, Congress passed the 16th Amendment to give the government the right to tax individuals' and businesses' income. The US still technically levies the same federal income tax now as it did then—though it's evolved.

The 13th Amendment permanently abolished slavery in the United States

Ratified in December 1865, the 13th Amendment outlawed slavery nationwide except as punishment for a crime. Southern states were required to ratify it under President Andrew Johnson's initial Reconstruction plan before regaining representation, though Congress later imposed stricter conditions.

How the Electoral College actually works

In settling on the rules for how the US elects presidents, the Founding Fathers coalesced around a system built on two inputs: Votes from individual voters, and the accumulation of votes from specially chosen Electors. The latter comprise the US Electoral College, and this Washington Post article explains why it exists, how it works, and how its 538 electors collectively decide presidential elections.

See a census of college students dating back to 1850

The first mention of college students in census surveys dates back to 1850, when officials realized a sizeable proportion of Americans lived on campus. More modern data from the National Center for Education Statistics capture the growth in the student population, with a breakdown beginning at the end of World War II with gender and type-of-institution data.

Amending the Constitution requires broad support

The framers created a demanding amendment process. Proposed changes require two-thirds approval in both houses of Congress and ratification by three-fourths of the state legislatures, making sure that constitutional amendments reflect a broad national consensus rather than temporary political majorities.

In the 1930s, Congress nearly passed a constitutional amendment requiring a national vote before declaring war

The Ludlow Amendment, proposed amid rising isolationism after World War I, would have required a national referendum before Congress could declare war, except in cases of direct attack. It was defeated 209 to 188 in 1938 after Roosevelt lobbied against it.

Birthright citizenship is the principle that a person acquires citizenship by being born within a country's territory, regardless of parental nationality or immigration status.

A timeline of US immigration laws

The United States began regulating immigration soon after it won independence from Great Britain, and the laws since enacted have reflected the politics and migrant flows of the times. Here's a timeline of key immigration laws from 1790 to 2014, according to the Pew Research Center.

The Constitution included compromises that still shape the US today

The creation of the Constitution necessitated numerous compromises to accommodate the diverse interests of the states. The significant compromises included resolutions on debates over representation in Congress and the status of enslaved individuals.