 I think that we could lose the whole thing, and it's staggering to me. Donald Trump's already been president. I thought he was the worst president that we've ever had. Biden emphatically refuses to bow out. He implored lawmakers in a sharply worded letter to refocus from him on the threat posed by Republican Donald Trump. It followed a flurry of interviews and appearances after Biden's poor debate performance. White House Press Secretary Karine Jean-Pierre.