FILE - In this Sept. 6, 2012 file photo, Rep. John Lewis of Georgia waves to delegates at the Democratic National Convention in Charlotte, N.C. For decades, Southerners put a firm impri

 

              FILE - In this Sept. 6, 2012 file photo, Rep. John Lewis of Georgia waves to delegates at the Democratic National Convention in Charlotte, N.C. For decades, Southerners put a firm impri
FILE - In this Sept. 6, 2012 file photo, Rep. John Lewis of Georgia waves to delegates at the Democratic National Convention in Charlotte, N.C. For decades, Southerners put a firm imprint on national politics from both sides of the aisle, holding the White House for 25 of the last 50 years and producing a legion of Capitol Hill giants throughout the 20th century. But that kind of obvious power has waned as Democrats and Republicans in the region navigate the consequences of tidal shifts in demographics, migration and party identity. (AP Photo/Lynne Sladky, File)