Primaries are customarily a chance for candidates, other than the incumbent, to garner enough votes to qualify to run in the General Election. They usually go along party lines and only people of that party or of independent party status participate in these types of elections. However, once chosen they are part of the General Election, where all of the electorate participates.
open
all registered voters can participate
All voters from any party are allowed to participate in an open primary. In an open primary, a voter may cast votes on a ballot of any party.
a primary election in which voters are not required to declare party affiliation
What is it called when voters choose the parties nominees
A semi-closed primary is a type of primary election where only registered party members and unaffiliated voters are allowed to participate. This means that voters who are registered with a different political party are not allowed to vote in the primary, but unaffiliated voters are given the option to choose which party's primary they want to participate in.
B open
Texas has an open primary system in which all registered voters are allowed to participate. However, a voter may only vote in one Party's primary. You may not vote, or participate, in more than one political party's primary election.
In a closed primary in Texas, voters can only participate in the primary of the party they are registered with. In an open primary, voters can choose which party's primary they want to participate in regardless of their party affiliation.
closed
In open primary districts, voters can choose to participate in any party's primary regardless of their own party affiliation. In closed primary districts, voters can only participate in the primary of the party they are registered with.
In a closed primary, only voters registered with a specific political party can participate in that party's primary election. Independent or unaffiliated voters are typically not allowed to vote in closed primaries.