AUGUSTA (AP) — Maine residents have rejected a legislative delay of ranked-choice voting, meaning the system will be used in federal elections in November in the state.

The voting system is used in 11 local jurisdictions but was used for the first time in a U.S. statewide primary on Tuesday.

Related: 2018 Maine Primary Election Results

Mainers also voted on a separate ballot question that nullified a legislative attempt to delay the system.

The system lets voters rank candidates from first to last; multiple voting rounds assure a majority winner.

The system initially approved by Maine voters in 2016 has faced legal challenges in addition to legislative roadblocks. On Tuesday, Republican Gov. Paul LePage announced he "probably" won't certify the primary election results, but the state's top election official said that won't change anything.