U.S. Representative Jesse Jackson Jr.’s monthlong absence from Congress is due to a mood disorder, not alcohol or drug-abuse treatment, according to the Illinois Democrat’s office.

“The congressman is receiving intensive medical treatment at a residential treatment facility for a mood disorder,” according to a statement from his physician released last night by Jackson’s office. “He is responding positively to treatment and is expected to make a full recovery.”

The physician’s name and that of the treatment facility were withheld to shield Jackson’s privacy, according to the lawmaker’s office, which said in its news release “the rumor about him being treated for alcohol or substance abuse is not true.” The office gave no further details, including how long Jackson would be on leave.

The secrecy surrounding Jackson’s condition has caused consternation among fellow Democrats, with some demanding that he be more forthcoming. Jackson, 47, regarded in the past as a rising star in the party due in part to his prominent lineage, is also facing an ethics investigation over the search for a successor to Barack Obama, who gave up his U.S. Senate seat in Illinois when he became president.

Earlier Wednesday, House Minority Whip Steny Hoyer added his voice to a group of Democratic lawmakers calling for Jackson to explain his ailments. Hoyer, the second-ranking House Democrat, told reporters that Jackson “would be well advised to give his constituents as much information” as possible about the medical condition and treatment that have kept him from Washington.

Unexplained Illness
Mark Reinecke, chief psychologist at Northwestern Memorial Hospital in Chicago and a specialist in depression and anxiety, said major depression and bipolar disorder are among the most common mood disorders.

Such illnesses are “very common and can be quite disabling in terms of the effect on an individual’s life and their functioning,” Reinecke said in a telephone interview. He said he had no personal knowledge of Jackson’s case.

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“These are conditions to be taken seriously,” Reinecke said. “Effective treatments are available but it’s difficult to know how long they will take.”

In a July 5 statement, Jackson’s office said the son of civil rights leader Reverend Jesse Jackson needed “extended inpatient treatment” for a medical condition that was “more serious” than previously thought.

“Recently, we have been made aware that he has grappled with certain physical and emotional ailments privately for a long period of time,” according to that earlier statement.

‘Inappropriate’ Questions
A June 25 statement from Jackson’s office said the lawmaker began a medical leave June 10 because he was suffering from exhaustion.

The congressman’s father, prior to the disclosure about his son’s mood disorder, told reporters yesterday it was “inappropriate” to ask questions about his son during the annual Rainbow PUSH Coalition business luncheon in Chicago. Some Illinois politicians agreed.

“I’m calling on all my Democratic friends to back off, give him some space,” Roland Burris, who was named to fill Obama’s Senate seat after he was elected president, said in an interview at the PUSH event.

Illinois Governor Pat Quinn, a Democrat, who also attended the luncheon, said, “The congressman needs time to get better, and I pray for him.”

House Democratic leader Nancy Pelosi of California also defended Jackson’s reticence, while telling a news conference she hoped “he will have the appropriate evaluation that so that he can share that information.”

Hoyer Switches
Hoyer made his comment a day after he defended Jackson’s announcements about his absence. The Maryland Democrat told reporters two days ago that Jackson’s office had “certainly reported that he is ill and seeking help” and “that fulfills that responsibility” to inform constituents.

On July 9, the second-ranking Senate Democrat, Dick Durbin of Illinois, told reporters that Jackson should provide constituents in his Chicago district with more information about his health.

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“There reaches a point when you have a responsibility to tell people what you’re facing and how things are going,” Durbin said.

Jackson is in his ninth term as a House member and survived a primary challenge in March from former Representative Debbie Halvorson.
Ethics Probe
He is under investigation by the House Ethics Committee, which is reviewing whether Jackson improperly lobbied in 2008 for appointment to a vacant U.S. Senate seat by then-Illinois Governor Rod Blagojevich.

A report by the Office of Congressional Ethics, which referred the matter to the ethics panel, said there was “probable cause to believe” that Jackson directed Chicago businessman Raghuveer Nayak to raise campaign money for Blagojevich in exchange for appointment to Obama’s former Senate seat or knew that “Nayak would make such an offer.”

On June 20, Nayak was arrested on unrelated federal charges of paying kickbacks to doctors for patient referrals, according to a Justice Department statement.
Jackson testified as a defense witness at Blagojevich’s political corruption trial, denied raising money for Blagojevich and said he refused the governor’s demand for a $25,000 campaign contribution.

Blagojevich, convicted in June 2011 of 17 corruption counts including bribery, extortion conspiracy and bribery conspiracy, is serving a 14-year prison term.