The switch from caucuses to primaries to ranked choice voting.
Ranked-choice voting is coming to the presidential election is the process for selecting the Democratic nominee.
Democrats are changing the rules to empower more of the party faithful in the 2020 presidential nominating process. As a result, at least 10 states are dropping their caucuses and going to primaries. And at least five will select at least some delegates using a controversial process known as ranked-choice voting.