A Michigan grassroots group says it has gathered enough petition signatures to put a measure on the 2018 ballot that would allow voters to choose whether to amend the state constitution to create an independent redistricting commission.

The group, called Voters Not Politicians, plans to turn in more than 425,000 signatures to the Michigan Secretary of State’s Office on Monday to begin the verification process. The group needs at least 315,654 valid signatures to get the measure on the ballot. The campaign and petition collection effort was run completely by volunteers, though the group has recently brought on paid public relations, fundraising and legal assistance.

An independent redistricting commission could have significant consequences in Michigan, which the Brennan Center for Justice describes as one of the most severely gerrymandered states in the country. Following the 2010 census, Michigan Republicans controlled the redistricting process and drew the lines in such a way that gave Republicans an advantage of two to three additional seats in Congress, according to the Brennan Center’s analysis.

The ballot initiative aims to make the redistricting process more fair by amending the Michigan Constitution to create a 13-member redistricting commission with four Democrats, four Republicans and five independents. The commission would be required to hold at least 10 public hearings as part of the redistricting process.

Katie Fahey, the president and treasurer of Voters Not Politicians, said the effort to gather hundreds of thousands of signatures started with a single Facebook post days after the 2016 election. At the time, she was hearing from both Democrats and Republicans who didn’t trust politicians.

“When I was thinking about that, I remembered in school learning about redistricting and about gerrymandering and how that’s one of our really fundamental systems that democracy has, yet in many states it is corrupt that we have politicians choosing their voters, instead of voters choosing their politicians,” she told HuffPost. “It just felt like a really good time to find an issue we could talk about no matter what your political belief was and actually start restoring some of that faith in democracy and those systems.”

Fahey, who works in the waste and recycling industry to help set up recycling programs, has never worked on a political campaign. She initially thought only her friends and family would respond to her Facebook post about gerrymandering. Instead, she got a swell of support from strangers and formed a board of directors with nine people whom she wouldn’t meet in person for three months. Today, she says, 10,000 people have helped the campaign. Fahey and her group will be two months ahead of the deadline to turn in signatures when they do so on Monday.