 He's also been recently complaining about the format that he and his campaign agreed to, particularly the lack of an audience. He said that it's a sterile, dead room. We'll see how that plays out tonight. Despite all the talk from Trump about how he believes Joe Biden lacks stamina, even suggesting the president might need some sort of artificial stimulant. As tonight's faceoff has neared, Trump also has indicated that Biden is a worthy debater who should not be underestimated.