Unfortunately it's probably very safe. She served 5 terms, was unseated by another Democrat and then won office again after re-districting.
She's an embarrassment to the HoR, DNC, Atlanta and Georgia, but she's a black Democrat in a heavily black, urban district, so she'll almost certainly be re-elected. The only hope is that the DNC gets tired of her and supports a challenger within the party.
I suspect the DNC is looking for a replacement and is refusing to grant election funds to her as well.
She's history.
Actually she was re-elected after the current occupant foolishly attempted a run for the U.S. Senate. McKinney had been defeated in the Democrat primary in 2002, when many GOP votors crossed over to vote for her opponent in the Democrat primary. Once the seat was vacated again in 2004, she coasted back in.
From the GOP's perspective, she's the gift that keeps on giving.
Oh yeah. She's a hero to her constituents. She done stuck it to THE MAN!