 President Biden wrote, it's in the best interest of my party and the country for me to stand down and focus solely on fulfilling my duties as president for the remainder of my term. Just minutes later, the president used social media again to endorse Vice President Harris, urging Democrats to come together and beat Donald Trump. Within hours, most other party leaders, potential running mates, or those who might have been potential challengers, backed her bid. But some big names held back, including former President Barack Obama,