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 .
Jason Erkes , a spokesman for Illinois Sen. Roland Burris , steps down . New questions arising over Burris ' appointment to Senate . Allegations Burris not honest about requests to raise cash for Blagojevich . Erkes does n't mention probe , says he must focus on his new business .