CHICAGO — U.S. Rep. Jesse Jackson Jr. has returned to his home in Washington after treatment for depression at Mayo Clinic, Jackson's chief of staff in suburban Chicago said Friday.

"He's at home in Washington convalescing with his wife and children," Jackson aide Rick Bryant said. "Let's hope he returns to work on Monday."

Congress goes back into session Monday following its summer break.

Bryant said he's not sure exactly when the Illinois congressman was discharged, and Mayo Clinic spokesman Chris Gade referred all questions to Jackson's office. In a statement late Friday, the congressman's wife, Chicago Alderman Sandi Jackson, said she and her husband were "thankful for the heartfelt prayers and kind thoughts from so many for our family."

The congressman went on a secretive medical leave in June, when family members said he collapsed at home. His office said in August that he was being treated at Mayo because of depression, after a transfer from the Sierra Tucson Treatment Center in Arizona.

The clinic in Rochester, Minn., has said Jackson was being treated for Bipolar II, which means he was suffering from periodic episodes of depression and hypomania. Hypomania is a less serious form of mania.

Former Rhode Island U.S. Rep. Patrick Kennedy, who also has dealt with bipolar disorder and been treated at Mayo, said after visiting Jackson at the clinic last month that the current congressman has "a lot of work" ahead of him on the road to recovery.

He said Jackson was taking his depression seriously and will have to learn how to treat his illness.

Kennedy, who served with Jackson on the House Appropriations Committee, left Congress last year. He has been an outspoken advocate for mental health and spoken publicly about his own struggles.

In their few public comments about Jackson's illness, family members pointed to the stress of his job and political disappointments over the years. Jackson first won office in 1995, and had his sights set on being a U.S. senator or Chicago's mayor. Those hopes dimmed in the wake of allegations about his connections to former Illinois Gov. Rod Blagojevich, who is serving a prison sentence for corruption.

The timing of the medical leave has invited more scrutiny on that front.

A pending House Ethics Committee investigation focuses on allegations that Jackson discussed raising money for Blagojevich's campaign so the then-Illinois governor would appoint him to President Barack Obama's vacated Senate seat.

Jackson's office announced his medical leave days after a former fundraiser connected to the allegations was arrested on unrelated federal medical fraud charges.

Jackson hasn't been charged and denies any wrongdoing.

Also on HuffPost:

Loading Slideshow...
  • 1912

    Former President Theodore Roosevelt champions national health insurance as he unsuccessfully tries to ride his progressive Bull Moose Party back to the White House. (Photo by Topical Press Agency/Getty Images)

  • 1935

    President Franklin D. Roosevelt favors creating national health insurance amid the Great Depression but decides to push for Social Security first. (Photo by Keystone/Getty Images)

  • 1942

    Roosevelt establishes wage and price controls during World War II. Businesses can't attract workers with higher pay so they compete through added benefits, including health insurance, which grows into a workplace perk. (Photo by Hulton Archive/Getty Images)

  • 1945

    President Harry Truman calls on Congress to create a national insurance program for those who pay voluntary fees. The American Medical Association denounces the idea as "socialized medicine" and it goes nowhere. (Photo by Keystone/Getty Images)

  • 1960

    John F. Kennedy makes health care a major campaign issue but as president can't get a plan for the elderly through Congress. (Photo by Keystone/Getty Images)

  • 1965

    President Lyndon B. Johnson's legendary arm-twisting and a Congress dominated by his fellow Democrats lead to creation of two landmark government health programs: Medicare for the elderly and Medicaid for the poor. (AFP/AFP/Getty Images)

  • 1974

    President Richard Nixon wants to require employers to cover their workers and create federal subsidies to help everyone else buy private insurance. The Watergate scandal intervenes. (Photo by Keystone/Getty Images)

  • 1976

    President Jimmy Carter pushes a mandatory national health plan, but economic recession helps push it aside. (Photo by Central Press/Getty Images)

  • 1986

    President Ronald Reagan signs COBRA, a requirement that employers let former workers stay on the company health plan for 18 months after leaving a job, with workers bearing the cost. (MIKE SARGENT/AFP/Getty Images)

  • 1988

    Congress expands Medicare by adding a prescription drug benefit and catastrophic care coverage. It doesn't last long. Barraged by protests from older Americans upset about paying a tax to finance the additional coverage, Congress repeals the law the next year. (TIM SLOAN/AFP/Getty Images)

  • 1993

    President Bill Clinton puts first lady Hillary Rodham Clinton in charge of developing what becomes a 1,300-page plan for universal coverage. It requires businesses to cover their workers and mandates that everyone have health insurance. The plan meets Republican opposition, divides Democrats and comes under a firestorm of lobbying from businesses and the health care industry. It dies in the Senate. (PAUL J. RICHARDS/AFP/Getty Images)

  • 1997

    Clinton signs bipartisan legislation creating a state-federal program to provide coverage for millions of children in families of modest means whose incomes are too high to qualify for Medicaid. (JAMAL A. WILSON/AFP/Getty Images)

  • 2003

    President George W. Bush persuades Congress to add prescription drug coverage to Medicare in a major expansion of the program for older people. (STEPHEN JAFFE/AFP/Getty Images)

  • 2008

    Hillary Rodham Clinton promotes a sweeping health care plan in her bid for the Democratic presidential nomination. She loses to Obama, who has a less comprehensive plan. (PAUL RICHARDS/AFP/Getty Images)

  • 2009

    President Barack Obama and the Democratic-controlled Congress spend an intense year ironing out legislation to require most companies to cover their workers; mandate that everyone have coverage or pay a fine; require insurance companies to accept all comers, regardless of any pre-existing conditions; and assist people who can't afford insurance. (Alex Wong/Getty Images)

  • 2010

    With no Republican support, Congress passes the measure, designed to extend health care coverage to more than 30 million uninsured people. Republican opponents scorned the law as "Obamacare." (Mark Wilson/Getty Images)

  • 2012

    On a campaign tour in the Midwest, Obama himself embraces the term "Obamacare" and says the law shows "I do care." (BRENDAN SMIALOWSKI/AFP/Getty Images)