text:  From ABC News, I'm Dave Packer. Most national Democratic leaders are trying to portray a united front in support of President Biden despite Thursday's debate performance. But Representative Jamie Raskin telling Velshi on MSNBC. We're having a serious conversation about what to do. And while there are calls for Biden to end his campaign to allow for another Democratic nominee, Biden's national co-chair, Delaware Senator Chris Coons telling ABC's This Week.