text:  There's not a problem. He's sharp. He's fit. He's always answering questions. He is on the ball. He was sharper than anyone I've spoken to. He is sharp. He is on top of things. There's no doubt in my mind that the president is mentally fit for us. Biden has proven himself to have a strong memory. He's completely mentally fit. He's at the top of his game. Oh, they are stuck, Vivek. They have dug themselves a hole. Vivek, your response.