text:  OK, so we just heard a little taste there of his appearance. That was MSNBC this morning. Biden also wrote a long letter today defending his plan, saying, I'm staying in the race. Did those two things help? What are you hearing? No, I'm hearing that both sides are still unmoved. And there's two categories here, those who are speaking publicly and those who are speaking privately. Some key members raised concerns over the weekend about Biden remaining in the race, including four committee leaders.