California • Colorado • Connecticut • Delaware
Florida • Georgia • Hawaii • Idaho • Illinois • Indiana
Iowa • Kansas • Kentucky • Louisiana
Maine • Maryland • Massachusetts • Michigan
Minnesota • Mississippi • Missouri
Montana • Nebraska • Nevada • New Hampshire
New Jersey • New Mexico • New York
North Carolina • North Dakota • Ohio • Oklahoma
Oregon • Pennsylvania • Rhode Island • South Carolina
South Dakota • Tennessee • Texas • Utah • Vermont
Virginia • Washington • West Virginia • Wisconsin • Wyoming
Voting in 2013 Primaries • Voting on November 5, 2013
Poll Opening and Closing Times
Absentee voting • Early voting
Open Primary • Closed Primary • Blanket Primary • Online voter registration in the 50 states
In a closed primary, only voters registered for the party which is holding the primary may vote. For example, if the Republican party is holding a closed primary, then only voters registered as Republicans are permitted to vote.
In some states, parties may have the option to invite unaffiliated voters to participate in the closed primary. Generally, unaffiliated voters will not be permitted to participate in the closed primary unless they choose to give up their independent status.
Some states used a semi-closed primary rather than a strict closed primary. A semi-closed primary allows unaffiliated voters to choose in which party primary to vote.
Some states use a different primary process for general elections than for other elections. There are 31 states that use a closed or semi-closed primary process for non-presidential elections.
- Alaska (Republican only)
- District of Columbia
- Hawaii (Democrat only)
- Idaho (Republican closed, Democrat semi-closed)
- Kansas (Republican closed, Democrat semi-closed)
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- Rhode Island
- South Dakota (Republican only)
- Utah(Republican only)
- West Virginia
Arguments for and against
Proponents of closed primaries argue that they preserve a political party's freedom of association as well as preventing members of other parties from "crossing over" to influence the nomination of an opposing party's candidate. 
Critics of the closed primary system argue that it exacerbates radicalization as candidates must cater to a party's, often more extreme, base rather than the political center. Voters who participate in primaries are often dedicated party regulars to whom candidates must appeal to win the primary. Once emerging from the primary, candidates often must change the focus of their campaigns to appeal to a broader electorate.
Critics also argue that because the closed primary often excludes independent voters, they are disenfranchised from choosing a possible nominee.
Other primary systems
- Ballotpedia:Index of Terms
- Open primary
- Voting in the 2013 primary elections
- Signature requirements and deadlines for 2014 state government elections
- ↑ Encyclopedia Britannica "Primary Election" accessed November 6, 2013
- ↑ 2.0 2.1 2.2 Wise Geek: "What is a closed primary?" accessed November 6, 2013
- ↑ Cite error: Invalid
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- ↑ 4.0 4.1 4.2 4.3 4.4 Fair Vote: "Congressional and Presidential Primaries: Open, Closed, Semi-Closed, and 'Top Two,'" accessed November 6, 2013
- ↑ MTV Rock the Vote: "Terms and Definitions," accessed November 6, 2013