2020 is a nightmare year by most metrics, and it’s also a worst-case scenario emerging out of a best-case scenario for Joe Biden. After trailing in early primary states, Biden came crashing back on a stunning wave of Super Tuesday support. Now the presumptive Democratic nominee in the midst of a global health crisis that’s immobilized the U.S. workforce and somehow even further polarized American politics, the former vice president will have to navigate completely uncharted waters to find a path to the presidency.