What other Features can Primaries and Caucuses bring?

-Voter Eligibility: Different States have Different Rules about Voting. States may have Open, Closed or Semi-Open Primaries. Or Caucuses -Translating Votes to Delegates. Can be Proportional or FPTP -Unpledged Delegates. Some Delegates are Important Party Officials, and can use their own Judgement to vote -One-Party Primary. Usually the Opposition Party will host Primaries. The Democrats under Biden have not really done much