The Constitutional Convention
Delegates from almost every state gathered in Philadelphia, originally just to revise the country's first governing document, the Articles of Confederation. src By mid-June they had decided to design an entirely new system of government instead. After months of debate and compromise, 38 delegates signed the finished Constitution on September 17, 1787. src You will also see the number 39. Both are right: one of the 38, George Read, signed a second time for John Dickinson, who was absent that day — so the document carries 39 signatures but only 38 signers. src As written, the Constitution left the question of who could vote mostly up to each individual state — and at the time, most states only allowed white men who owned property to vote.
→ National Archives: The Constitution — How Did It Happen?The 15th Amendment
The 15th Amendment said the right to vote could not be denied "on account of race, color, or previous condition of servitude" — meaning states could no longer legally bar formerly enslaved men and other Black men from voting because of their race. src In practice, enforcement was uneven for decades. Starting in the 1890s, many Southern states used tools like literacy tests and grandfather clauses to keep Black citizens from actually voting, despite the amendment's promise. Literacy tests were finally outlawed by the Voting Rights Act of 1965 — nearly a century later. src
A fee some states charged people before they were allowed to vote. Because it fell hardest on poor citizens, it was used for decades to keep many Black voters and poor white voters away from the polls. Poll taxes in federal elections were banned by the 24th Amendment in 1964, and the Supreme Court struck them down in state elections too in 1966.
The 19th Amendment
The 19th Amendment said the right to vote could not be denied "on account of sex" — giving women across the country a constitutional right to vote for the first time. src It was ratified on August 18, 1920, after decades of organizing by suffrage activists. Like the 15th Amendment, its promise wasn't immediate for everyone: discriminatory state voting laws still kept many Black women and other women of color from actually voting for decades afterward. src
The Indian Citizenship Act
Congress declared all Native Americans born in the United States to be "citizens of the United States." src But citizenship did not come with a ballot. Who could vote was still left to each state — the same rule written back in 1787 — and some states used that rule to keep Native citizens away from the polls anyway. Arizona and New Mexico both barred Native voters until 1948, and the fight went on into the 1950s. src That is the 15th Amendment's pattern happening all over again: the promise arrives first, and the vote arrives later.
Tribal nations are not just part of this history. Washington has 29 federally recognized tribes today, each one a sovereign government. src
→ National Archives: the Indian Citizenship Act, 1924The Voting Rights Act
President Lyndon B. Johnson signed the Voting Rights Act to directly enforce the 15th Amendment. src It banned literacy tests, sent federal officials to register voters in places with a history of discrimination, and required certain places to get federal approval before changing their voting rules. By the end of 1965, a quarter of a million new Black voters had registered. src
→ National Archives: The Voting Rights Act of 1965The 26th Amendment
The 26th Amendment lowered the voting age nationwide from 21 to 18. src It moved through Congress and the states in under four months — the fastest any amendment has ever been ratified — partly driven by the argument that 18-year-olds who could be drafted to fight in the Vietnam War should also be able to vote. src
Hidden History Unlocked
1913 — The 17th Amendment: Before 1913, U.S. Senators weren't elected by voters at all — state legislatures picked them. The 17th Amendment changed that, giving regular voters the direct power to elect their own Senators for the first time. It passed partly because some state legislatures had become gridlocked or corrupt over Senate picks, leaving seats empty for months. src