With Francis' future still in the hands of the House, Claire is sworn in as acting president after the Senate names her vice president. In her first crisis as commander in chief, she confronts Russian President Viktor Petrov following a suspected takeover of a U.S. research station in Antarctica. As Francis devises a plan to have revotes in Tennessee and Ohio to decide who will be the next president, Alex Romero offers to help woo an influential member of the House Black Caucus to support him – even as he continues providing vital inside information to the Conway campaign. However, when Aidan Macallan starts leaking damaging information about what happened around Election Day, team Underwood shifts into high gear to protect Francis and Claire. Despite Claire's doubts, Francis pushes his revote plan, unaware that Romero is helping Conway gain the Black Caucus' support. But when Conway stumbles badly in their meeting, Mark Usher is left to repair the damage. As Claire enlists Catherine Durant to respond to Petrov's aggression, she and her husband move forward with the unprecedented revote. As a rift opens up between Hammerschmidt and Jeffries over how to pursue the investigation into Francis, Usher and Ted Brockhart worry about Conway's declining mental state. News that Macallan has been kidnapped in Indonesia forces LeAnn and Doug to find him before he can release even more information. With tensions inside the Conway camp reaching a boiling point, Claire, Francis and Durant are negotiating with Petrov by phone when he reveals that Macallan is in Moscow threatening additional leaks. Finally, as Hammerschmidt finds evidence of Doug's role in Rachel Posner's death, Usher offers to have new elections in Tennessee and Ohio in exchange for a secret agreement with the Underwoods about the vacancy on the Supreme Court.