State Sen. Dan Rutherford is expected to announce his candidacy for state treasurer today. Rutherford has been exploring the run since this past spring. He ran unsuccessfully for secretary of state against Jesse White in 2006.
Also, Republican attorney Bill Cadigan is considering a run for the 10th congressional district, which will be open if and when Mark Kirk decides to run for the U.S. Senate.
UPDATE 1: We're also hearing that this week Lake County Commissioner Michelle Feldman will be announcing her candidacy for Mark Kirk's 10th CD.