Jesse Jackson, Jr. (Getty Images)
By Catalina Camia, USA TODAY
Rep. Jesse Jackson Jr. reportedly will resign from Congress, according to the Chicago Tribune.
The newspaper quotes Jackson's brother, Jonathan, as a source. The Illinois Democrat, first elected in 1995, is expected to send a letter of resignation "momentarily" to House Speaker John Boehner.
Jackson, the son of the civil rights leader, has been on medical leave since mid-June and twice sought treatment at the Mayo Clinic for bipolar disorder. He was easily re-elected to a ninth full term, even though his constituents haven't seen or heard from him in months.
Once considered a rising Democratic star, Jackson is being investigated on allegations that he misused campaign funds to pay for redecorating his house and an expensive watch for a friend.
Jackson hired former federal prosecutor Dan Webb to work out a plea deal on the campaign finance allegations. CBS News said the deal would likely include jail time.
The congressman also has been the subject of a long-running House Ethics Committee investigation stemming from allegations that he raised money for then-Illinois governor Rod Blagojevich in exchange for appointment to the U.S. Senate. Jackson has denied wrongdoing.