 ABC News, I'm Sherry Preston. President Biden pushing back against growing pressure from Democrats to withdraw from the race after his debate performance this week. ABC's Selina Wang is at the White House this morning. Sources say that Biden and Vice President Harris spoke to campaign staff on Wednesday, trying to reassure them to move forward together. The 81-year-old telling them, I'm in this race to the end and we're going to win. Biden doing radio interviews today with hosts in Philadelphia and Madison, Wisconsin,