From CNN:
Every effort the president and his White House and campaign teams make to fix the problem end up exacerbating it. White House press secretary Karine Jean-Pierre on Tuesday endured a briefing that was almost as painful to watch as the debate itself. She said that while Biden had a cold at the debate, he hadn’t taken medication but was now feeling better. But she declined to go beyond Biden’s already released annual physical results that found him fit for duty in February. The explanations did not account for why Biden trailed off in some answers, sometimes appeared incoherent and stared open-mouthed while Trump spoke during the CNN debate.