Third Parties in the US: Who They Are and Why They Rarely Win

In 1992, Ross Perot won 18.91 percent of the popular vote for president, according to the Federal Election Commission. His share of the Electoral College was zero.

That gap explains a lot about third parties in American politics. Millions of people vote for them, and every few decades a third-party candidate shakes up the presidential race. Winning is another matter. Here are the parties that matter today, their biggest breakthroughs and the rules that keep the two major parties on top. Party details are current as of October 2026.

The third parties that matter today

“Third party” means any political party other than the Democrats and Republicans. Dozens exist at the state level; these have the widest reach.

1. Libertarian Party

Founded in 1971, the Libertarian Party is the largest third party in the country and the one most likely to appear on your ballot. Libertarians want a much smaller government: low taxes, free markets, few limits on personal choices and no foreign wars.

Its best result came in 2016, when Gary Johnson won 3.28 percent. In 2024, Chase Oliver got 0.42 percent, FEC figures show. The party holds mostly offices at the local level, such as city councils and school boards.

2. Green Party

The Green Party of the United States formed in 2001, when state Green parties united and the FEC recognized it as a national party committee. Its platform rests on Ten Key Values, among them ecological wisdom, social justice and nonviolence. In practice that means fast action on climate change, single-payer health care and limits on corporate money in politics.

Jill Stein has been its nominee three times. In 2024 she won 862,049 votes, or 0.56 percent.

3. Constitution Party

The Constitution Party started in the early 1990s as the U.S. Taxpayers Party and took its current name in 1999. It wants government to follow the Constitution and the Bill of Rights as originally understood, with firmly conservative positions on abortion, immigration and federal spending. Its 2024 nominee, Randall Terry, received 41,294 votes.

4. Forward Party

Forward formed in July 2022 when Andrew Yang’s Forward Party merged with two groups led by former Republicans. Yang and former New Jersey Governor Christine Todd Whitman became co-chairs. The slogan: “Not Left. Not Right. Forward.”

Forward has no classic platform. It wants to change the rules instead, with open primaries, independent redistricting and ranked-choice voting. As of October 2026 its affiliates have ballot status in a handful of states, including Utah, where a state senator sits as a Forward member, and New Mexico, which granted it minor-party status in May 2026.

5. Smaller and past parties worth knowing

• Working Families Party: mostly backs Democrats through “fusion voting” in states such as New York, where one candidate can run on several party lines.
• Reform Party: founded by Perot after 1992; he ran as its nominee in 1996.
• American Independent Party: George Wallace’s vehicle in 1968, when he carried five Southern states.
• Independents: candidates with no party at all face the same hurdles.

Three breakthroughs that shook the presidency

Year	Candidate (party)	Popular vote	Share	Electoral votes
1912	Theodore Roosevelt (Progressive, “Bull Moose”)	4,120,207	27.4%	88
1992	Ross Perot (Independent)	19,742,267	18.91%	0
2000	Ralph Nader (Green)	2,882,897	2.74%	0

Sources: National Archives and American Presidency Project (1912), FEC (1992, 2000).

1912: the Bull Moose Party

Former President Theodore Roosevelt lost the Republican Party nomination to President William Howard Taft and ran for the Progressive Party. He finished second, ahead of Taft, which no third-party candidate has done since. The split helped Democrat Woodrow Wilson win 435 electoral votes. Some Progressive ideas, such as direct election of senators, later became law.

1992: Ross Perot

The Texas businessman ran against the deficit and against trade deals, and he took part in all three presidential debates. Analysts still argue over whether he drew more from George H.W. Bush or from Bill Clinton, who led Bush by about 5.8 million votes.

2000: Ralph Nader

This race is the root of the modern spoiler debate. In Florida, George W. Bush beat Al Gore by 537 votes while Nader drew 97,488, according to the FEC. Many Democrats say Nader cost Gore the White House. Nader’s supporters reply that no candidate owns anyone’s vote, that many of his voters would have stayed home, and that every other minor candidate on Florida’s ballot also topped 537. Both sides are doing correct math; they disagree about what it proves.

Why third parties rarely win

No law requires a two-party system. The system just behaves as if one does.

First-past-the-post and Duverger’s law

Most US elections use single-member districts and plurality voting, or first-past-the-post: whoever gets the most votes wins, even without a majority. French political scientist Maurice Duverger observed that this setup tends to produce two dominant parties, a pattern now called Duverger’s law. People who fear “wasting” a vote move to the stronger major candidate, and donors follow them.

The Electoral College adds to the effect. Forty-eight states and D.C. give all their electors to the statewide winner, which is how Perot’s 19.7 million voters ended up with no electors. Our guide on how the Electoral College works has the details.

Ballot access

Each state writes its own ballot-access rules. Republicans and Democrats usually qualify automatically. A third party often has to gather thousands of signatures, and to keep its status it may need a minimum share of the vote or of registered voters. A national campaign can spend much of its money just getting listed.

The 15 percent debate threshold

For 2024, the Commission on Presidential Debates set three tests in its published selection criteria:

1. Constitutional eligibility to be president.
2. A place on enough state ballots for a mathematical chance at an Electoral College majority.
3. At least 15 percent support in the average of five national polls chosen by the commission.

No third-party candidate has met that bar since the rule arrived in 2000. In 2024 the campaigns skipped the commission and agreed on network debates instead. As of October 2026, the commission has not published criteria for 2028.

Money and borrowed ideas

Public funding depends on past results. The FEC gives partial general-election money only to a minor party whose nominee won between 5 and 25 percent last time. And when a third party finds a popular issue, a major party often adopts it, which leaves fewer reasons to switch.

Ranked-choice voting: the reform idea

With ranked-choice voting (RCV), voters rank candidates in order. If no one wins a majority of first choices, the last-place candidate drops out and those ballots go to their next choice, until someone has a majority. Maine, Alaska and Hawaii use it in at least some statewide elections, and Alaska decides on a repeal measure on November 3, 2026.

Supporters say	Critics say
You can back a third party without fear of spoiling the race	Ranking many names confuses some voters
The winner needs majority support in the final round	Ballots that rank no remaining candidate drop out
Campaigns have to appeal beyond their base	Results take longer, which can cost trust

RCV has become a partisan fight of its own. Nineteen states had banned it as of March 2026, according to Ballotpedia, mostly through Republican-led legislatures, while reform groups such as Forward push for wider use. How the two major parties differ elsewhere is covered in our Democrat vs. Republican comparison.

Key takeaways

• Third parties are all parties besides the Democrats and Republicans. The biggest are the Libertarian, Green and Constitution parties; Forward is growing from a small base.
• The best third-party result was Roosevelt’s 27.4 percent in 1912. Perot won 18.91 percent in 1992 and no electoral votes.
• They rarely win because of first-past-the-post voting, the winner-take-all Electoral College, ballot-access rules and the 15 percent debate threshold.
• The spoiler debate, above all Nader in 2000, has no settled answer.
• Ranked-choice voting could ease the spoiler problem, but 19 states have banned it. In closed primary elections, third-party members can’t vote in major-party races.