 As concerns about his candidacy grow, President Biden seems to be spending much of his time lately trying to convince fellow Democrats that he's up for the race for a second term. He's released a letter to congressional Democrats saying he wasn't blind to the concerns about his age and his candidacy that have emerged since his disastrous debate performance. But he argued that by easily winning the nomination in the Democratic primary process, stepping aside would disenfranchise those voters. He also phoned into Morning Joe on MSNBC.