Why were woman excluded from the National Labor Union?

Woman were excluded from the National Labor Union because men believed that women were used to drive down their wages and that woman should be the ones to stay at home and take care of the household and children instead of working. Woman agreed to staying at home and watching over the household and children as long as conditions made it possible for men to support their families. If conditions made it impossible for men to support their families; women argued that they should have full and equal opportunities in the workplace.