Jesse Jackson Jnr quits Congress
Lawmaker cites bipolar disorder and 'mistakes' over campaign money as reasons he left office
Jesse Jackson Jnr, citing his mental health, has resigned from the US House of Representatives, effectively ending the once-promising political career of the civil rights icon's son and namesake.
Jackson had previously gone on a mysterious period of extended medical leave, while facing separate federal investigations.
Just two weeks after voters re-elected him to a ninth full term in office, Jackson sent his resignation letter to House Speaker John Boehner on Wednesday, citing treatment for bipolar disorder and admitting "my share of mistakes".
The House Ethics Committee is investigating his dealings with imprisoned former governor of Illinois Rod Blagojevich.
For the first time Jackson publicly acknowledged reports of a new federal probe believed to be looking into his possible misuse of campaign money.
"I am aware of the ongoing federal investigation into my activities and I am doing my best to address the situation responsibly, co-operate with the investigators, and accept responsibility for my mistakes," he wrote.
Jackson, 47, a Democrat, disappeared in June, and it was later revealed that he was being treated at the Mayo Clinic for bipolar disorder and gastrointestinal issues.