By Max Blau Pew Charitable Trusts Burley tobacco once lined nearly every road in Shelby County. But when Paul Hornback drives through his hometown, the 62-year-old tobacco farmer rarely sees the leafy crop. Despite his fears about tobacco farming, long the lifeblood of his community, Hornback supports the push to ban teenagers from buying cigarettes. Last month, U.S. Senate Majority Leader Mitch McConnell,...