Top-Two Primary
An electoral system where all candidates compete in a single primary election and the two highest vote-getters advance to the general election regardless of party.
Updated April 23, 2026
How It Works in Practice
In a Top-Two Primary system, all candidates for a given office appear on a single primary ballot, regardless of their political party affiliation. Voters can select any candidate they prefer, without being restricted by party lines. After the votes are tallied, the two candidates who receive the highest number of votes advance to the general election, even if they both belong to the same party. This contrasts with traditional partisan primaries where each party selects one nominee to move forward.
Why It Matters
The Top-Two Primary system aims to promote broader voter choice and reduce extreme partisanship. By allowing all voters to participate in a single primary and potentially advancing two candidates from the same party, it encourages candidates to appeal to a wider electorate rather than just their party base. This can lead to more moderate candidates being elected and can enhance competition in districts dominated by one party.
Top-Two Primary vs. Closed Primary
Unlike closed primaries where only registered party members can vote to select their party's candidate, Top-Two Primaries are open to all voters regardless of party registration. Closed primaries restrict participation to party members, potentially reinforcing party polarization. The Top-Two system, by contrast, creates a more inclusive and competitive environment by combining all candidates and voters in a single contest.
Real-World Examples
The state of California has implemented a Top-Two Primary system for statewide and congressional elections. This means that in California's primary elections, voters see all candidates on one ballot, and the top two move on to the general election. Washington state also uses a similar Top-Two Primary system. These implementations have provided real-world data on how this system affects electoral outcomes and party dynamics.
Common Misconceptions
One common misconception is that the Top-Two Primary eliminates political parties from elections. In reality, parties still endorse and support candidates, but the system changes how candidates advance to the general election. Another misunderstanding is that it always results in two candidates from the same party advancing; while this can happen, especially in districts dominated by one party, it is not guaranteed and varies by election.
Example
In California's 2012 congressional elections, the Top-Two Primary allowed two Democrats to advance to the general election in a heavily Democratic district, illustrating the system's impact on party competition.