Meanwhile, two of his four challengers in next year's primary are trying to recover from recent media disclosures.
Circuit Clerk Dorothy Brown held a brief news conference to announce she had fired a campaign worker who at a South Side office allegedly hired clients of a state welfare program to get signatures on petitions for Brown's Democratic primary run for county board president.
"I've not and do not condone anyone using taxpayer money for political work," said Dorothy Brown, (D) county board president candidate.
Incumbent President Todd Stroger said the allegation raises questions about Brown's character and should be investigated thoroughly.
"I think people will look at that and say that's not the kind of leadership they want. They don't want their tax dollars spent in that manner," said Stroger.
Meanwhile, another candidate, Terrence O'Brien, responded to reports that private companies in which he's invested have done local government business - but never, he said, with the Water Reclamation District where O'Brien is president.
"I would never compromise my integrity nor would I compromise the agency's integrity with regards to doing work for the Water Reclamation District," said O'Brien.
Then O'Brien told ABC7 his business affairs will not be an issue if he's elected.
"I will divest myself of my interest in the companies that I am presently involved in right now," said O'Brien.
At the clerk's office, the first and possibly the only Green Party candidate filed petitions to run in the county board president's primary.
Tom Tresser, who helped organize No Games Chicago which fought the city's bid for the 2016 Olympics, says he'll only take donations from private citizens.
Other filers in the Democratic primary race include 4th Ward Alderman Toni Preckwinkle and U.S. Congressman Danny Davis.
Davis also circulated petitions to run for re-election to congress. He says he'll make his final, final decision about on November 9.
Davis' indecision has caused a political logjam. Many people are poised to run for his seat in Congress if he stays in the county board president's race.