what type of primary does not label the party of the candidates
Nonpartisan blanket primary A nonpartisan blanket primary is a primary election in which all candidates for the same elected office, regardless of respective political party, run against each other at once, instead of being segregated by political party. It is also known as a jungle primary,[1] qualifying primary, or top-two primary. The so-called Louisiana primary is different because it is a general election with a possible runoff if no candidate wins a simple majority in the first round.
United States presidential nominating convention In 1831 the Anti-Masonic Party convened in Baltimore, Maryland to select a single presidential candidate agreeable to the whole party leadership in the 1832 presidential election. The National Republican and Democratic Parties soon followed suit.