As March Madness arrives, this week host Tim Boyum takes a slight detour from politics to talk tobacco and basketball.   The North Carolina rivalries developed on “Tobacco Road” are in peril as conference realignment threatens to dramatically change college sports. Raleigh News & Observer’s Andrew Carter recently wrote a piece exploring the actual history of the real tobacco road and the sports version as well.   It inspired a lot of powerful stories and reminded Tim about the sense of community and larger human stories that often emerge from sports.