AIUI, failing to represent a union member would be a short, fast path to getting a union decertified. This is one of the major differences between the US and s

AIUI, failing to represent a union member would be a short, fast path to getting a union decertified. This is one of the major differences between the US and say Germany. There, the union can decide someone is a butthead and decline to help. US unions have no such flexibility. This is down to shenanigans in the 50s involving racial discrimination.