Former Minneapolis police officer Derek Chauvin had just been found guilty on all counts when the family of George Floyd took a phone call in a hallway of the Hennepin County Courthouse. It was the president. He was on speakerphone. “Nothing is going to make it all better, but at least now there is some justice,” Joe Biden told the grieving family before promising that Floyd’s 7-year-old daughter, Gianna, would ultimately be proved right when she said, “My dad is going to change the world.” Changing the world, in this case, means changing policing in America. But to accomplish his goals, Biden needs Congress. The filibuster, the parliamentary procedure that requires 60 Senate votes to pass legislation, could very well hang in the balance.