( CNN ) -- Mike Erkes , a spokesman for State Sen. Bob Burris , steps down . New questions arising over Burris ' appointment to Senate . Allegations Burris not honest about ability to raise cash for campaign . Erkes does n't mention probe , says he will focus on his new campaign .
Mike Erkes , a spokesman for State Sen. Bob Burris , steps down . New questions arising over Burris ' appointment to Senate . Allegations Burris not honest about ability to raise cash for campaign . Erkes does n't mention probe , says he will focus on his new campaign .