The Success Story Behind Maine's Adoption of Semi-Open Primaries

Shawn GriffithsShawn Griffiths
Published: 13 Sep, 2021
2 min read

Maine has long been at the forefront of political innovation, from the way its ballots are designed, to its clean election funds program, to same-day voter registration and no-excuse absentee voting, to implementing ranked choice voting. Yet, it bolstered its reputation even more when it passed semi-open primary reform in 2021.

Open Primaries, which partnered with Open Primaries Maine to move the needle on primary reform in the state, released a new report on the multi-year process that culminated in the passage of LD 231. The report also offers political reform advocates ideas that can be used across different reform efforts.

Due to Maine’s historically high number of independent voters, approximately a third of voters were barred from the primaries each election cycle, meaning their right to equal and full participation was conditioned on registering with a party. Under LD 231, independent voters can choose the party ballot they want to vote on in the primaries.

The campaign to build cross-partisan support for open primaries focused its message on fairness and inclusion. It was not about electing moderates. It was not about punishing political parties or attempting to get specific outcomes. The goal was to bring voters together around the idea that all citizens, regardless of party, should be treated fairly in elections.

And, the messaging worked. Open Primaries and Open Primaries Maine garnered the support they needed among voters and in the legislature to get a bill to the governor’s desk. It wasn’t always an easy task and it took 5 years to make it happen with a compromise bill that didn’t give reformers everything they wanted, but was still a critical step in primary reform.

Several variables went into the success of LD 231, which Open Primaries lays out in its report. No one was left out of the discussion of what primary reform should look like, and as a result, semi-open primaries were approved in Maine with a historic bipartisan vote, something not often seen in today’s political climate.

Check out Open Primaries’ full report here.

In this article

You Might Also Like

Person placing vote in ballot box.
Vote Nevada Targets Gerrymandering and Closed Primaries with Two New Ballot Measures
Vote Nevada PAC filed two constitutional amendment initiatives Tuesday aimed at transforming how Nevadans vote – and how maps are drawn. The group argues that its proposals will ensure a redistricting process free of corruption while guaranteeing all voters equal access to the ballot....
11 Sep, 2025
-
6 min read
How It Really Works Voter Rights
How It Really Works: Does Your Vote Even Matter?
Imagine showing up to vote in November, proud that you are doing your civic duty, only to learn that the real contest happened six months ago without you. The winner was decided in a low-turnout primary while you were busy living your life. This is not a conspiracy. It is how the system was built. ...
10 Sep, 2025
-
12 min read
Supreme Court building.
Retired Attorney Takes Voting Rights Case All the Way to the Supreme Court -- By Himself
The next big voting rights case the Supreme Court of the United States could consider wasn’t filed by the ACLU, the League of Women Voters, Common Cause, or another household name when it comes to voter rights. ...
09 Sep, 2025
-
5 min read
Will the Texas Republican Party be Successful Where the Hawaiian Democratic Party Failed?
Will the Texas Republican Party be Successful Where the Hawaiian Democratic Party Failed?
The Republican Party of Texas (RPT) is suing Secretary of State Jane Nelson in an effort to close the state’s primary elections to party members only – a move that the Democratic Party of Hawaii (DPH) tried back in 2013 in its state and failed. ...
05 Sep, 2025
-
3 min read
Supreme Court building.
Retired Attorney Takes Voting Rights Case All the Way to the Supreme Court -- By Himself
The next big voting rights case the Supreme Court of the United States could consider wasn’t filed by the ACLU, the League of Women Voters, Common Cause, or another household name when it comes to voter rights. ...
09 Sep, 2025
-
5 min read
congress flag
Poll: 82% of Americans Want Redistricting Done by Independent Commission, Not Politicians
There may be no greater indication that voters are not being listened to in the escalating redistricting war between the Republican and Democratic Parties than a new poll from NBC News that shows 8-in-10 Americans want the parties to stop....
10 Sep, 2025
-
3 min read