U.S. President Donald Trump sought to dispel any perception of weakness Sunday with a surprise and seemingly risky outing from his hospital bed to greet supporters even as his doctors once again rewrote the official narrative of his illness by acknowledging two alarming episodes they had previously not disclosed.

The doctors said that Trump’s blood oxygen level dropped twice in the two days after he was diagnosed with the coronavirus, requiring medical intervention, and that he had been put on steroids, suggesting his condition might be more serious than initially described. But they insisted that his situation had improved enough since then that he could be released from the hospital as early as Monday.

The acknowledgment of the episodes raised new questions about the credibility of the information provided about the commander in chief of a superpower as he is hospitalized with a disease that has killed more than 209,000 people in the United States. With the president determined not to concede weakness and facing an election in just 30 days, officials acknowledged providing rosy assessments to satisfy their prickly patient.