WASHINGTON (AP) – House Majority Whip Steve Scalise has undergone surgery for “the management of infection” and remains in serious condition.

That’s the word Thursday from MedStar Washington Hospital Center, where the Louisiana congressman has been since he was grievously wounded last month when a gunman opened fire at a baseball practice.

The hospital says Scalise tolerated the surgery well. It had issued a statement late Wednesday saying Scalise had been readmitted to the intensive care unit and had downgraded his condition from fair to serious.

Scalise and four other people were injured last month when a gunman opened fire on a Republican baseball practice in nearby Alexandria, Virginia. The 51-year-old congressman was struck in the hip and the bullet tore into blood vessels, bones and internal organs. He has had several surgeries.

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