TOPEKA, Kan. (AP) — Kansas Democrats plan to have voters rank candidates rather than pick only one in a presidential primary set for May 2020.

The party is moving away from its more traditional caucuses, trying ranked-choice voting and allowing mail ballots to boost participation, State Chairwoman Vicki Hiatt said Tuesday. The state party has submitted its plans for the May 2 balloting to the Democratic National Committee for its approval.

About 39,000 people participated in Kansas Democrats' presidential caucuses in 2016, an unusually large turnout that resulted in a 2-to-1 victory for Vermon...