White liberal:


"This Negro soldier was sitting on a seat opposite to a white man. The bus was not crowded, and he wasn't sitting in front of any white. But the driver came back and told him to move. He refused. The driver shouted, 'I'm gonna move you.' The Negro took his coat off and said, 'Well I'm fixing to go off and fight for democracy. I might as well start right now.' And I want to tell you that bus driver backed down. It did me good to see it."

What causes the bus driver to back down from his threat?