Maine tries ‘ranked-choice’ voting: A ballot can ‘count’ more than once

To win a primary race in Maine next month, candidates will have to do something unusual: Aim not just to be voters’ first choice, but their second, third and perhaps fourth choice, too.

Maine is the first state to use the ranked-choice voting system for statewide and federal elections, earning plaudits from advocates who say it is a step toward making the U.S. a better, less polarized democracy.