https://en.wikipedia.org/wiki/Primary_elections_in_the_United_States

Primary elections in the United States are elections in which the candidates for a particular ... As in closed primaries, registered party members can vote only in their own party's primary. Semi-closed systems, however, allow unaffiliated voters  ...

https://ballotpedia.org/Closed_primary

In 14 states, at least one political party conducts closed primaries for congressional and state-level ...

http://www.ncsl.org/research/elections-and-campaigns/primary-types.aspx

Partially Closed. In this system, state law permits political parties to choose whether to allow unaffiliated voters or ...

https://d3n8a8pro7vhmx.cloudfront.net/openprimaries/pages/26/attachments/original/1412345733/OpenPrimary_national_chart.pdf?1412345733

Open and Closed Primary States*. State. Voter Registration. Presidential Primaries. State Primaries 2012-2013. Alabama. Nonpartisan. Open. Open. Alaska.

https://www.fairvote.org/open_and_closed_primaries

In a closed primary, only voters registered with a given party can vote in that party's primary. States with closed primaries include party affiliation in voter ...

https://www.thirdway.org/memo/kill-caucuses-and-closed-primaries

Apr 9, 2019 ... Caucuses and closed primaries empower the most dedicated .... In states with closed primaries, parties and candidates have no reason to ...

https://www.thoughtco.com/what-is-an-open-primary-3367495

Apr 27, 2018 ... Read a definition of an open primary and learn which states hold open primaries. Find out how an open primary differs from a closed primary.

https://ivn.us/2014/01/16/what-are-the-different-types-of-primary-elections/

Jan 16, 2014 ... Closed primaries, however, vary in other states. In New Jersey, for example, voters can declare the day of an election. However, both systems ...

https://www.openprimaries.org/primaries_by_state

Click on your state on the map to see how primary elections are conducted in your ... on the grounds that the state's closed primary system is unconstitutional.

https://independentvoterproject.org/primary-map

Congressional/State: Semi-closed Primary. Presidential: Semi-closed Primary. Party Registration Statistics. Total Registered Voters: 541,821. Democrats: 74,865 ...