Louisiana’s move to a party-primary system, which limits voters to a single party’s primary but still allows unaffiliated voters to participate, is expected to cost up to $47 million over five years.

The changes do not apply to municipal races such as mayor, district attorney, sheriff, municipal boards, and judgeships.

Governors have often picked speakers of the House and presidents of the Senate, but weighing in on the Republican Caucus leadership is unusual.