The National Football League recently announced a new policy requiring players to stand during the national anthem or stay in the locker room. Earlier this week, President Donald Trump called off a visit by the Philadelphia Eagles to the White House, citing the dispute over the NFL kneeling ban. We check out issues of constitutionality and find out how players and owners are reacting. GUESTS: Howard Bryant - author of "The Heritage: Black Athletes, A Divided America, and the Politics of