 St. Anselm College political analyst Chris Galdieri says if Biden wants to assure Americans he should stay in the race, he needs to do more in public. None of these radio call-ins or anything is going to get anywhere near the wall-to-wall coverage that the debate has. How the president conducts himself over this next week could be the deciding factor on whether he'll be able to silence the calls for him to step aside. John Stolnes, Washington.