Washington ( CNN ) -- Rep. Jesse Jackson Jr. has checked out of the Mayo Clinic , where he was being treated for bipolar depression , and is now back in Washington with his family , his chief of staff said Friday . The 47-year-old Jackson had not been on Capitol Hill since late May . His office said in early June that he was suffering from a `` medical condition , '' and -- after two other updates -- last month the Mayo Clinic released a statement indicating that Jackson was being treated for bipolar depression . Rick Bryant , the chief of staff in Jackson 's congressional office , said the Illinois Democrat left the prestigious Minnesota medical facility and is back in the nation 's capital . Jackson suffered from 'deep , deep depression ' Asked whether Jackson will return to work when Congress returns from recess on Monday , Bryant said , `` We hope . '' The congressman 's father -- the Rev . Jesse Jackson , a well-known civil rights leader -- told The Huffington Post last month that when he visited his son in Washington in June , he learned the junior Jackson had n't slept for three days . What the family thought was exhaustion , the elder Jackson said , was `` something much deeper , much broader , and it lasted longer . '' The congressman 's wife , Sandi , told the Chicago Sun-Times in August that her husband had his `` good days and bad days , '' with doctors at the Mayo Clinic increasing his depression medication to `` therapeutic levels . '' She firmly denied that her husband attempted suicide or was getting help for alcohol and drug addiction . Jackson 's illness comes as the House Ethics Committee is examining allegations that , in 2008 , he or one of his associates offered to raise money for then-Illinois Gov . Rod Blagojevich in exchange for Jackson being appointed to the Senate seat vacated by Barack Obama after he was elected president . The congressman has maintained his innocence and pledged to continue to cooperate with authorities . As for Blagojevich , he was convicted last year on corruption charges in connection with efforts to profit from appointing the successor to the Senate seat . A day after visiting Jackson at the Mayo Clinic last month , longtime friend and former U.S. Rep. Patrick Kennedy said he suspected that `` stress in ( Jackson 's ) life , particularly because he 's under investigation , '' may have set off his depression . Kennedy struggled with addiction and bipolar disorder and is a mental health advocate . `` Many of us have genetic predisposition to cancer , heart disease or , in this case , mental illness , but they often get triggered by environmental factors , '' said Kennedy , the son of the late Sen. Edward Kennedy . `` In mental illness , stress is an environmental factor and clearly , I think , has been a factor in his succumbing to this outbreak of his bipolar disorder . '' Bipolar disorder is a treatable condition that affects parts of the brain controlling emotion , thought and drive , the Mayo Clinic says . Many Americans suffer from it , and it is most likely caused by a complex set of genetic and environmental factors , it says . Medical experts are still weighing whether gastric bypass surgery that Jackson underwent in 2004 for weight loss might have helped trigger his depression , his wife said . The Mayo Clinic said that type of surgery is increasingly common in the United States and can change how the body absorbs food , vitamins , nutrients and medications . What do we know about mood disorders ?
Rep. Jesse Jackson Jr. was last seen on Capitol Hill in late May . He got treatment at the Mayo Clinic for bipolar depression . Asked whether Jackson will be back at work Monday , a top aide says , `` We hope ''