> What, so in the US people doing a certain type of job at a certain company can only join a single union if one is already recognised by their employer?! Yes

> What, so in the US people doing a certain type of job at a certain company can only join a single union if one is already recognised by their employer?! Yes. There are a few exceptions, but by and large: once a union is granted authorization over a bargaining unit, the union exclusively represents all employees included in the bargaining unit (whether or not those employees voted for the union or are members of the union).