At the end of the day, musicians on both sides would play to raise the spirits of soldiers.
VOA: special.2010.07.25
They play Jewish American soldiers during World War Two.
VOA: special.2009.06.12
This plays out in video games and fiction and comic books and movies, where we play as near-invincible soldiers, ninjas, or barbarians or read about super heroes or powerful wizards, or watch Chuck Norris lay bearded waste to wave upon wave of bogies.
But come the general election union members will still make fine get-out-the-vote foot soldiers for whoever wins the Democratic nomination, even if union bosses can no longer play kingmaker.