How does ranked choice voting work in Democratic presidential primaries?

Ranked choice voting (RCV) fits within the Democratic Party’s presidential delegate selection rules, including proportional delegate allocation and the 15% “threshold.” Ranked choice voting can be used to select multiple winners, and is not inherently a majority-winner or winner-take-all system. As the Democratic National Committee and states consider how RCV might be used in the 2028 presidential primaries, this post explains how votes could be counted and delegates awarded. How are votes counted and delegates awarded in Democratic presidential primaries in general? Democratic Party rules require that candidates receive at least 15% of the vote in a state to earn...