BOSTON — A former congressman. Law professors. Advocates for campaign finance reform. But no Republicans.

The so-called Citizens Commission, created by Question 2 on the November ballot, now has all 15 of its members.

The ballot question, which passed with 71% of the vote, established a commission to research and advocate for a constitutional amendment overturning the U.S. Supreme Court’s 2010 ruling in Citizens United. That decision allowed corporations to spend unlimited amounts of money supporting or opposing a candidate as long as they do not coordinate directly with the candidate.

The law says the committee members should represent a range of geographic, political and demographic backgrounds.

Despite that requirement, the commission has nine Democrats and six unenrolled voters, but no Republicans.

Attorney Jeffrey Clements, president of American Promise, a Concord-based group formed to limit the influence of money in politics that spearheaded the ballot campaign, is a member of the commission. Clements said he knows Republicans voted for the commission and applied to it. He said the ultimate appointments were a “great group” that reflect Massachusetts’ diversity.

“I have no doubt we’re going to engage Democrats, Republicans and independents across the spectrum,” said Clements, who is unenrolled. “This isn’t a partisan issue. The commission’s job is to make sure every Massachusetts citizen is heard, and that’s what we’ll do.”

Typically, it has been Democrats who tend to support overturning Citizens United. Both of Massachusetts’ Democratic U.S. senators, Ed Markey and Elizabeth Warren, endorsed the ballot question and want to overturn the Supreme Court decision.

The Citizens Commission members were appointed by the governor, attorney general, secretary of state, Senate president and House speaker. Gov. Charlie Baker is the lone Republican among that group.

Baker’s appointments were William Kilmartin, a consultant for Accenture and state comptroller from 1989-99; Matthew McKnight, a biotech executive and Marine Corps veteran; and Bopha Malone, vice president of Enterprise Bank, who ran unsuccessfully for Congress from the 3rd District. Malone is a Democrat; Kilmartin and McKnight are unenrolled.

Affiliates of American Promise appointed to the commission included Clements and Joyce Sanchez, a former employee of American Promise who is now getting a master’s degree in urban affairs at Boston University.

Several members have political experience. Michael Harrington of Salem was a Democratic congressman who represented the 6th District from 1969-78. Carmine Gentile is a Democratic state representative from Sudbury.

The commission includes three professors — Vermont Law School professor Jennifer Taub, of Northampton; Harvard Law School professor Nikolas Bowie, of Cambridge; and Northeastern University political science professor Costas Panagopoulos, of Wellesley.

Cheryl Clyburn Crawford is executive director of MassVOTE, which works to make voting more accessible to historically disenfranchised communities.

Other members include Scott McDermott, a managing director of the investment firm New Harbour Partners and a lecturer at Boston College’s business school; Dominick Pangallo, chief of staff for the Salem mayor; Noval Alexander, a substitute teacher and Army veteran living in Framingham; and Holliston attorney Jay Marsden.

Applications for the commission are public, a policy established by the ballot question. Among the notable applicants who were not selected were former independent gubernatorial candidate Evan Falchuk, former Democratic Governor’s Councilor Michael Albano, former Republican candidate for auditor Helen Brady and Harvard Law School professor Lawrence Lessig.

Clements said he hopes once commission members get sworn in, they will conduct hearings around Massachusetts to learn about how money in politics affects people’s everyday lives. He said the priority of the commission will be engaging people in recognizing the problem of money in politics and encouraging them to back a constitutional amendment to overturn Citizens United.

Clements said he hopes Massachusetts will be able to demonstrate how to “bring people together across the political spectrum to move this forward.”