BIDDEFORD, Maine — A state lawmaker from Biddeford, Maine, has left the Democratic Party to become an independent.

Rep. Martin Grohman said Friday that he’s tired of being told to tow the party line and blamed both major parties for causing political gridlock.

Grohman, who’s a member of the Criminal Justice and Public Safety Committee, said Maine needs “legislators who can cross the partisan divide, who are beholden first and foremost to the Maine people.”

His decision brings the number of unenrolled House members to six, but doesn’t affect the balance of power. Democrats hold 74 seats to 70 for Republicans.

Grohman is the third Democratic House member to unenroll this year, joining Rep. Denise Harlow of Portland and Rep. Ralph Chapman of Brooksville as independents.