 The White House press secretary had several heated exchanges with reporters earlier about whether the administration had been transparent about the president's health. Well, for his part, President Biden, in a public letter to congressional Democrats, is standing firm against calls for him to drop his candidacy after his dismal debate performance in Atlanta. The president wrote in a two page letter, the question of how to move forward has been well aired over a week now, and it's time to put it to an end.