A recent influx of black residents in Metro Councilwoman Martha Jane Tassin’s district could complicate her re-election bid this fall. When Tassin — a white Republican — was re-elected in 2004, black voters outnumbered white voters by about 500. Today, voter registration records show that there are some 3,530 more black voters than white voters in District 6. Some black leaders such as Councilman Ulysses “Bones” Addison are already targeting Tassin, claiming her district should be represented by an African-American. “It’s nothing personal against Mrs. Tassin, she’s a fine lady. But that seat should be held by a person of...