What is the 17th Amendment?

The 17th Amendment reads: 'The Senate of the United States shall be composed of two Senators from each State, elected by the people thereof, for six years; and each Senator shall have one vote. The electors in each State shall have the qualifications requisite for electors of the most numerous branch of the State legislatures. When vacancies happen in the representation of any State in the Senate, the executive authority of such State shall issue writs of election to fill such vacancies: Provided, That the legislature of any State may empower the executive thereof to make temporary appointments until the people fill the vacancies by election as the legislature may direct. This amendment shall not be so construed as to affect the election or term of any Senator chosen before it becomes valid as part of the Constitution.' Congress proposed the 17th Amendment on May 13, 1912, and it was ratified on April 8, 1913, when the required three-fourths majority of the then-48 states had ratified.

Before the 17th Amendment, Article I, Section 3 of the original 1787 Constitution provided that senators were 'chosen by the Legislature' of each state. Under that system -- in place from 1789 to 1913 -- state legislators, not voters, chose U.S. Senators. The system produced recurring problems: state legislators could be bribed to select particular Senate candidates, giving wealthy interests disproportionate influence over the upper chamber. Deadlocks between the two chambers of a state legislature -- common in closely divided states -- left Senate seats vacant for months or years, depriving states of representation. The progressive reform movement of the late 19th and early 20th centuries pressed for direct election as part of a broader democratization of American government. By 1912, more than two-thirds of the states had adopted primaries or popular referendums to guide their legislators' Senate choices, but reformers argued that only a constitutional amendment could uniformly establish genuine popular election. The 17th Amendment resolved that by removing the legislature entirely and vesting the choice of senators in the voters, subject to the same eligibility qualifications that apply to voting for the most numerous branch of the state legislature.

The 17th Amendment's vacancy clause governs how Senate seats are filled between elections. When a vacancy occurs -- through death, resignation, or expulsion -- the governor of the affected state may issue a writ of election to call a special election. Additionally, if the state legislature has enacted a law empowering the governor to make a temporary appointment, the governor may appoint a senator to serve until the election is held and the winner is certified. This gubernatorial appointment power has been exercised in modern times: for example, in 2009, the Massachusetts governor appointed a temporary senator after Senator Edward Kennedy died in office. A temporary appointee serves only until the election fills the seat; the appointed senator does not complete the full remainder of the original term unless elected.

The 17th Amendment has direct relevance to the 2028 presidential race. Several of the most closely watched 2028 presidential candidates currently serve or have recently served as U.S. Senators elected by their states' voters under the 17th Amendment, including Ted Cruz (Texas), Mark Kelly (Arizona), Cory Booker (New Jersey), Raphael Warnock (Georgia), Ruben Gallego (Arizona), Elissa Slotkin (Michigan), Amy Klobuchar (Minnesota), Rand Paul (Kentucky), Josh Hawley (Missouri), Tom Cotton (Arkansas), and Tim Scott (South Carolina). JD Vance (Ohio) and Marco Rubio (Florida) also held Senate seats before becoming Vice President and Secretary of State, respectively. The 17th Amendment does not impose any additional eligibility requirements to seek the presidency -- a sitting senator running for president must satisfy the same three Article II requirements as any other candidate: natural-born U.S. citizenship, age 35 or older on Inauguration Day, and 14 years of U.S. residency. Serving in the Senate is not a constitutional prerequisite for the presidency; the Constitution imposes no prior-officeholding requirement.