Marc Elrich, answers a question at a debate between democratic candidates for County Executive in Montgomery County, on Oct. 16, in Rockville. (Sarah L. Voisin/The Washington Post)

Progressive Maryland, an influential grassroots group, on Monday endorsed council member Marc Elrich (D-At Large) in the Montgomery County executive race .

Elrich, who faces five Democratic opponents in the June 26 primary, is “a candidate with proven progressive legislative victories,” said Larry Stafford Jr., executive director of Progressive Maryland, which has more than 100,000 members and supporters in the state.

He pointed to Elrich’s efforts to protect the health of Ten Mile Creek, an environmentally fragile watershed, support for grass fields over artificial turf, raise the minimum wage and promote responsible development in Montgomery, Maryland’s most populous jurisdiction.

Elrich, who has served on the council since 2006, has also been endorsed by the Metropolitan Washington Council AFL-CIO, SEIU Local 32BJ and Casa in Action.

The other Democrats in the race are council members Roger Berliner (Potomac-Bethesda) and George L. Leventhal (At Large), Potomac businessman David Blair, state Del. C. William Frick and former Rockville mayor Rose Krasnow.

Republican Robin Ficker is also running to succeed outgoing County Executive Isiah Leggett (D), although the winner of the Democratic primary is usually the heavy favorite to win the general election in deep-blue Montgomery .

Elrich was a founding member of Progressive Montgomery, the precursor to Progressive Maryland. In a statement, he said he was “thankful for their partnership in making the county a better place to live and work.”