"Viable" defined as hitting 15%+ in a presidential election or alternatively the party could obtain 35+ seats in the House and or 2 seats in the Senate.

AI Generated Context Below

Resolution criteria

This market resolves YES in the year a third party first meets either criterion:

• Receives 15%+ of the popular vote in a U.S. presidential election, OR

• Wins 35+ seats in the U.S. House of Representatives and/or 2+ seats in the U.S. Senate

Resolution will be determined by official election results from the Federal Election Commission (https://www.fec.gov/election-results/) for presidential vote share and House/Senate seat counts from Congress.gov (https://www.congress.gov/).

The market resolves to the specific year when the threshold is first achieved. If neither criterion is met by 2050, the market resolves NO.

Background

Third-party and independent candidates received 2.13% of the vote in the 2024 election, far below the 15% threshold. Third-party and independent members of the United States Congress are generally rare, and although the Republican and Democratic parties have dominated U.S. politics in a two-party system since 1856, some independents and members of other political parties have also been elected to the House or Senate. Currently, the Senate includes two independents who caucus with Democrats, and there are no third-party members in the House.

No third party in the last century has ever threatened to take power. The two major parties have largely run minor-party competitors out of business in intentional ways, with Democratic and Republican officeholders adopting laws making it more difficult for others to run, and in nearly every state, lawmakers banned ballot "fusion," a once-widespread practice that allows multiple parties to nominate the same candidate.

Considerations

The two-party system has evolved in such a way that makes it close to impossible for a third-party candidate to actually win the election outright. Historically, H. Ross Perot won 19% of the popular vote in 1992 and Robert La Follette picked up 16% of the vote in 1924, representing the closest approaches to the 15% threshold in modern times. The structural barriers to third-party success—including ballot access requirements, debate qualification thresholds, and the spoiler effect—remain formidable obstacles to achieving viability under this market's definition.

This description was generated by AI.

• Update 2026-02-28 (PST) (AI summary of creator comment): The 35+ seats threshold was chosen based on historical analysis:

  • The Progressive Party ("Bull Moose" Party) in 1912 won 9 official seats, representing close to the lowest number that held significant sway

  • The Know-Nothing Party had 43 representatives at their peak

  • 35 seats represents approximately 8% of the current House, which would be sufficient to act as a power broker between the two major parties

This threshold accounts for the varying size of the House of Representatives throughout U.S. history.