Illinois Congressman Jesse Jackson Jr. (D) is being treated for bipolar disorder according to doctors at the Mayo Clinic in Minnesota.

Doctors officially diagnosed Jackson with bipolar II, but said in a statement that he was responding well to treatment.

Jackson abruptly took a leave of absence from his office on June 10 after saying he was dealing with physical and emotional issues. Last month, his spokesman Frank Watkins told ABC News that the situation was “more serious than we thought and initially believed.”

Jackson was taken to a treatment facility in Arizona before being transferred to the Mayo Clinic. However, Jackson’s father, the Rev. Jesse Jackson knew something was seriously wrong with his son before he even left Washington. After a June visit with, the elder Jackson discovered that his son hadn’t slept in three days.
Rev. Jackson told CNN that the situation was “something much deeper, much broader, and it lasted much longer.”

Jackson’s recent time on Capitol Hill has been mired in scandal. He’s currently being investigated by the House Ethics Committee over allegations that he raised money to pay former Illinois Gov. Rod Blagojevich to name him to the Senate seat vacated by Barack Obama’s victory in the 2008 presidential election.

In 2010, Jackson admitted to having an inappropriate relationship with Giovana Huidobro, a hostess at Ozio, a Washington D.C. cigar lounge.

Meanwhile, the Mayo Clinic says a 2004 bariatric surgery, which aids in weight loss, may be a possible cause of Jackson’s bipolar disorder.

“Congressman Jackson underwent bariatric surgery in 2004,” the statement said. “This type of surgery is increasingly common in the U.S. and can change how the body absorbs food, liquids, vitamins, nutrients and medications.”