"Right now, his focus is on the (Biden) Foundation and Cancer Moonshot, as well as getting other Democrats elected. He's not there. He's taking it day by day after the loss of my dear beloved brother (Beau)," she said. "He'll make a decision when that time comes," she continued. "A lot can happen in four years and we know this as a family. If he is in good health, knock on wood, and seeing what the landscape is at the time, yeah, I think he is considering it."