With President Biden approaching 80-years-old, many have speculated that he is not the one pulling the strings in the administration. While some point to people like Barack Obama or Susan Rice having control, the more obvious place to look is the chief of staff. Ron Klain led the Biden administration for the first two years but has since decided to pursue other opportunities. This opened the door for Jeffrey Zients, who most recently served as the White House COVID Response Coordinator under Biden. What should we know about this Zients character, given he’s now one of the most powerful people in the administration? Mike Slater investigates.