It’s important to distinguish the union leadership from its rank and file. Anyone can see that Hillary Clinton (or Bill) has done nothing for rank and file labor. Anyone can see that Obama has done nothing for the rank and file. Anyone should be able to deduce that the Democratic party must have done quite a bit for the income earned by the leadership because no matter how badly the Democrats treat the rank and file, the leadership continues to endorse these Democrats. Union leadership will never endorse Sanders because he does not have the resources to keep these leaders economically comfortable.