Amid a coronavirus-disrupted session that separates lawmakers from the public, schoolteachers on Wednesday made up labor unions’ biggest show of force this year. About 100 showed up in red jackets, shirts, blouses and ties to show solidarity against a measure educators say singles them out for bureaucratic harassment because they belong to a labor union. The Senate Government Oversight Committee, on a party line vote, OK’d the bill (SB 1014) that would require labor organizations to demonstrate every year that they have at least 50% of a bargaining unit’s workforce as dues-paying members. Below that, they would have to seek recertification with the state’s Public Employees Relation Commission to represent teachers in negotiations for wages, benefits, and other workplace procedures.