 I'm Meghna Chakrabarty. Today on Point, what we know and don't know about early onset cancer. Stay with us. Live from NPR News in Washington, I'm Lakshmi Singh. President Biden's attempting to silence the calls from his own party to drop out of the race for reelection. He sent a letter today to Democratic members of Congress to argue that the party should respect the will of Democratic voters who selected him as their nominee.