Meet 16 obscure Maine Democrats shaping Graham Platner’s replacement

A handful of mostly unknown Democrats, including a retired art teacher, a candidate’s husband and a finance executive, will soon have unprecedented influence over the U.S. Senate race.

Maine Democrats are slated to host a 600-member convention this month, with roughly 500 of those members selected by the party’s 16 county apparatuses. Being a county chair is usually a low-key position. After Graham Platner’s Wednesday announcement that he will leave the race following sexual assault allegations, they are suddenly in a position of power.

Here are the 16 people tasked with creating a delegation to pick who will face off against Republican Sen. Susan Collins.

Joseph Zamboni: Cumberland County

As Maine’s most populous county, Cumberland will have the largest delegation at the coming convention. Its party chair is health policy and law professor and pro-vaccine advocate. He currently serves as the chair of Portland’s zoning board and previously worked for the state and the federal Department of Health and Human Services.

Kathie Purdy: York County

York, the southernmost county, is the state’s second most populous. Its delegation will be led by Kathie Purdy, a former candidate for the state Legislature. She is a business owner in Saco and a bar manager in Ogunquit, according to her LinkedIn profile.

Harry Sanborn: Penobscot County

Alton resident Harry Sanborn is involved in local government, serving as a member of both the planning board and budget panel. He also serves as the town’s sexton. His wife, Laura, a former lawmaker and county commissioner, is a school board member for Regional School Unit 34.

Joanne Mason: Kennebec County

Kennebec’s Democratic Party chair is Joanne Mason, a nonprofit leader and the wife of Sheriff Ken Mason. According to her LinkedIn, she is president of the Family Violence Project, an Augusta-based nonprofit.

Carl Wilcox: Androscoggin County

From his social media history, Wilcox appears to be on the left of the party. In response to a white nationalist rally in DC last week, he posted that “billionaires control the media and the government sets the rules to funnel ever greater sums to the billionaire class,” echoing Platner’s anti-billionaire language. He hiked the entire Appalachian Trail in 2016.

Alison Willette: Aroostook County

Willette has relatively little online presence, but the Aroostook County Democrats downplayed the chair’s role in a Thursday Facebook post, writing, “the process is still being hashed out, but I assure you all counties have representation involved and it is NOT a ‘cherry picked by the chair’ process!”

Aroostook’s delegation, likely to be the seventh-largest, could be a source of support for former Senate President Troy Jackson, an Allagash native who is running to replace Platner in his populist mold.

Bruce Bryant: Oxford County 

Oxford is one of the only counties with a chair that served in the state Legislature. Bruce Bryant was a Senator between 2002 and 2010. In 2024 he ran for state senate again, but lost to Republican Joseph Martin. On social media he voiced support for Troy Jackson when he was running for Governor.

Marcia Myers: Hancock County

Myers is a former news editor who now lives in Deer Isle. Her social media history shows posts invoking independent socialist Sen. Bernie Sanders and attending “No Kings” protests. She told MS NOW in June that Democrats in Hancock were “laser-focused on issues like healthcare and cost of living.”

Lise Ragan: Somerset County

Ragan is an Anson resident and former teacher who describes herself on Facebook as a “patriotic, very concerned American.” She told the Bangor Daily News she is “confident” the party can move forward with a new candidate for U.S. Senate.

Greg Marley: Knox County

Rockland resident Greg Marley is married to the city’s former mayor and current state Rep. Valli Geiger, a Platner ally running to replace him. In response to a post by The Midcoast Villager about Valli’s interest, Marley posted that he “stand[s] beside this extraordinary woman every step of the way.” Geiger had been a close ally of Platner, who she says encouraged her to run.

Marley is a clinical director of suicide prevention at Maine’s chapter of the nonprofit National Alliance on Mental Illness.

Stanley Paige Zeigler: Waldo County

Zeigler is a former merchant mariner and state representative. He represented part of Waldo County between 2016 and 2024. He has been involved with environmental organizations like the Sierra Club and the Maine Bike Coalition.

Keith Mestrich: Lincoln County

Lincoln County’s chair is set for one of the smallest delegations, but he may have something that other party leaders lack and that many party voters have shunned over the course of Platner’s campaign — money and connections.

Keith Mestrich got his start in labor organizing and eventually became CEO of Amalgamated Bank, a union-owned financial institution. He is now a founding partner of Percapita, a financial tech firm providing an employee benefit platform for low-income workers. He also serves as the chair of the National Trust for Local News, whose Maine arm owns The Portland Press Herald and sister papers.

Lisa Marin: Washington County

Washington County Democrats are led by a retired art teacher who worked at the Moosabec Community School District in Jonesport. The Downeast resident’s Facebook history shows that she has attended “No Kings” protests. She recently wrote a Press Herald op-ed condemning Republican gubernatorial nominee Bobby Charles.

Wayne Kinney: Franklin County

Kinney represents Farmington on the RSU 9 school board. His online presence is limited.

Deb Dagnan: Piscataquis County

Dagnan will lead the smallest county delegation. She had expressed skepticism about Platner after The New York Times published a story in June detailing claims of abuse by his ex-girlfriends. She told PBS ahead of the primary election that people were “waiting for the other shoe to drop after he gets the nomination.”

“Then what do we do?” she asked.

Daniel O’Connor is a Report for America corps member who covers rural government as part of the partnership between The Maine Monitor and the Bangor Daily News, with additional support from BDN and Monitor readers.