As I watched Sen. McCain's funeral recently, I felt a deep loss of true American greatness. I also felt the conviction and determination to honor him in his daughter's eulogy. I saw our former presidents, all seated in the congregation, each stand up and tell us that as Americans we must stand up for each other, put our better selves forward to form a more perfect union. Most importantly, we must somehow remember that we are all on the same team. If there is still a Team America still shining bright on a hill, as all great teams know, there is only greatness in unity.