Maine could become the first state in the U.S. to use ranked choice voting in presidential elections.
Maine is set to become the first state to allow voters to rank candidates in a general presidential election.
Democratic Gov. Janet Mills said Friday she'll allow such a bill to become law in January without her signature.
The legislation requires ranked-choice voting in presidential elections and primaries.
Mills' office says ranked voting won't be used in a planned presidential primary in March 2020. But future presidential primaries would use it.
Under the system, voters rank three or more candidates on a ballot in order of preference. If no candidate gets more than 50%, the last-place candidate is eliminated.
The second-choice votes of everyone who ranked that candidate first are allocated until someone receives over 50%.
Mills says ranking could empower voters. But she expresses fiscal and logistical concerns.
