By the CNN Wire Staff
(CNN) - U.S. Rep. Jesse Jackson Jr. is responding well to treatment for bipolar depression, the Mayo Clinic said Monday.
The Rochester, Minn.-based clinic said Jackson is regaining his strength but offered no further information on his condition.
In early July, the congressman's office announced he was "receiving intensive medical treatment at a residential treatment facility for a mood disorder." A few weeks later, his office said he was undergoing an "extensive inpatient evaluation for depression and gastrointestinal issues" at the Mayo Clinic.
Jackson's wife, Sandi, said earlier this month her husband had "good days and bad days" and doctors were increasing his depression medication to "therapeutic levels."
The Illinois Democrat and son of the Rev. Jesse Jackson, the civil rights leader, has not been on Capitol Hill since late May.
Jackson and his family have not said much about his ordeal, though his father told The Huffington Post that when he visited his son in Washington in June, he learned the junior Jackson hadn't slept in three days.
What the family thought was exhaustion, the Rev. Jackson said, was "something much deeper, much broader, and it lasted much longer."
Sandi Jackson has firmly denied her husband had attempted suicide or was receiving help for alcohol or drug addiction.