House Majority Whip Steve Scalise is back in the intensive care unit at a hospital in Washington, D.C.
The congressman and five others were wounded in a shooting at a baseball field in Alexandria, Virginia, last month. Police fatally shot the gunman.
Scalise was shot in the hip and required immediate surgery.
His condition steadily improved after several surgeries, and he was transferred out of the ICU nine days after the shooting. Scalise remained in the hospital, though.
According to an update from the hospital, doctors downgraded Scalise's condition from fair to serious because doctors are concerned about infection.