Joe Biden was fresh off winning the Michigan primary and effectively capturing the Democratic presidential nomination, a prize he'd sought for the better part of three decades. Instead of plotting a strategy to build momentum, he was contemplating an abrupt halt. Health experts recommended the 77-year-old Biden step away from campaigning as soon as possible, both for his safety and that of staff and supporters. Biden agreed. He decided that he and every staff member would work from home starting that weekend. All field offices would be closed. He wouldn't return to in-person campaigning for 174 days.