“Former White House chief of staff Jeff Zients testified behind closed doors at length about former President Joe Biden’s aging throughout the course of his term, including how he pushed Biden’s doctor to conduct a full medical workup,” CNN reports.“Zients told House Oversight investigators that Biden’s decision-making slowed during the course of the administration and that the former president’s difficulty remembering dates and names worsened over time.”Also important: “Following the debate, Zients testified he and other Biden advisors believed that Biden should exit the race.”