A mural depicting Maine’s labor history was removed from the lobby of the state’s Department of Labor and stored at an undisclosed location over the weekend by directive of Gov. Paul LePage. Mr. LePage, a Republican elected in 2010, says the mural favors labor interests at the expense of business interests. Last week, he ordered that the mural be taken down and that Labor Department conference rooms named for labor leaders be renamed for mountains, counties or something else perceived as neutral. Robert Shetterly, president of the Union of Maine Visual Artists, called it “an exceptionally cowardly act” to move it over the weekend when no one would notice.