Donald Trump attacked Bruce Springsteen on Truth Social, mocking the musician's appearance and calling for a boycott of his concerts.The insults followed Springsteen’s performance in Minneapolis where he labeled the current administration as corrupt, racist, and treasonous.Multiple labor unions including the AFL-CIO defended the singer against the personal attacks while highlighting his role as a voice for working people.Springsteen also debuted a new song addressing federal immigration raids and recent deaths during law enforcement encounters in Minnesota.