State treasurer Alexi Giannoulias' chief of staff Robin Kelly is campaigning for her boss's job next year. Kelly says she's exploring a run for state treasurer. The announcement could be another sign that Giannoulias is serious about his run for the U.S. Senate in 2010. Kelly set up her campaign committee in March and is now taking contributions through her campaign website. She says she wants to guard Illinois families' tax dollars. Kelly was a state representative from Chicago's south suburbs before joining the treasurer's office.