Walter Isaacson on Bob Iger's legacy at Disney

Disney announced Tuesday that Bob Iger will step down as Disney CEO and assume the role of executive chairman. Bob Chapek, who most recently served as chairman of Disney parks, experiences and products, will assume the role of CEO, effective immediately. Walter Isaacson, Tulane professor and an advisory partner at Perella Weinberg Partners, joins "Squawk Box" to discuss.