America“Open” can describe who may participate. “Top two” describes how many candidates advance. They are different design choices, not interchangeable names.
Separate entry from advancement
An open partisan primary generally allows voters to choose a party ballot without limiting participation to that party’s registered voters. A top-two format uses a common candidate field and advances the highest two. Exact state rules, offices, and exceptions matter.
The EAC’s overview helps distinguish these concepts. Before making a local claim, read the official candidate and voter instructions for that jurisdiction and election.
Draw the process before evaluating it
Use a four-box sketch: eligible voters → available ballot → nomination count → general-election field. Where does the proposed change operate? If the problem is primary access, changing the general-election count alone may not resolve it.
If a shared primary advances two candidates, ask what happens when both come from the same party. If separate party primaries remain, ask whether each party still chooses its own nominee. These are structural questions, not predictions about which side wins.
Ask about representation and administration
Compare access, candidate diversity, voter understanding, ballot availability, recount procedures, and general-election choice. A rule may improve one goal while creating a trade-off elsewhere. Write those trade-offs down instead of using “open” as a complete evaluation.
A useful public explainer should include the actual rule, a sample ballot, and a candidate-advancement example. Keep proposed changes visually separate from the system voters will use in the next election.
Make it useful
Your next steps
- Identify who is eligible to participate.
- Identify whether ballots are party-specific or shared.
- Identify exactly how nominees or finalists advance.
Take it into practice
A starting template you can adapt—not a form submitted to America.co.
Current eligible voters: ____. Ballot field: ____. Advancement rule: ____. Proposed change: ____. Office and cycle covered: ____. Official source: ____.
Common questions
Can two candidates from one party advance in top two?
That is possible in a top-two structure. Check the exact applicable rules.
Does open primary mean voters rank candidates?
No. Eligibility and ranking are separate features.
Follow the source trail
Source pages consulted October 4, 2026. Original worksheets and evaluation questions are America.co guidance; they are not government instructions.
- EAC — Primary election types ↗Official election guidance
This guide uses AI-assisted drafting and links the underlying sources. It has not been presented as expert-reviewed advice. Read our editorial approach. Send a correction with the source and passage.