Jesse Jackson Jr Getty Images
Rep. Jesse Jackson Jr. resigned from Congress on Wednesday, ending a once-promising political career.
House Speaker John Boehner has received Jackson's letter of resignation, Boehner spokesman Michael Steel said.
The Illinois Democrat, a son of the civil rights leader, was first elected in 1995. Jackson has been on medical leave since mid-June and twice sought treatment at the Mayo Clinic for bipolar disorder.
At the same time, the one-time rising Democratic Party star was the subject of two separate investigations of wrongdoing.
The U.S. Justice Department was investigating allegations that Jackson, 47, misused campaign funds to redecorate his house and buy 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 reported that the deal would allow Jackson to resign for health reasons, serve some jail time, require him to repay any campaign funds used for personal purposes and allow him to keep his congressional pension.
Jackson 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 denied wrongdoing in that investigation, which will now end. The panel does not retain authority over former House members.
"He did have a very promising career," said Dick Simpson, a political science professor at the University of Illinois at Chicago and a former Chicago alderman. "He seemed to be on an upward trajectory. He'd had some setbacks ... but nonetheless he was still a very dominant, very important figure in Chicago politics and had the potential to play a role nationally, particularly if the Democrats ever took back control in the House."
Jackson's resignation will spark a special election in his Chicago-area House seat, a heavily Democratic enclave. Illinois state law requires that an election must beheld within 115 days after the seat is vacated.
Local news reports have said possible Democratic candidates include Cook County Chief Administrative Officer Robin Kelly, state Sen. Toi Hutchinson, and state Sen. Kwame Raoul, who holds the legislative seat once held by President Obama.
Unless Jackson is convicted of a felony that would prevent him from collecting his congressional pension, he would be entitled to about $45,000 in benefits when turns 62, according to Pete Sepp, executive vice president of the National Taxpayers Union.