This is an unprecedented election year in a lot of ways, but that doesn't mean history can't be a good teacher. Today, we look at how Biden is squaring up against Trump for the election in November, and the sexual assault allegations that could haunt him on the trail. On today's show, Julian Zelizer, professor of history and public affairs at Princeton University, CNN political analyst, co-host of the podcast Politics and Polls, and author of the forthcoming Burning Down the House: Newt Gingrich, the Fall of a Speaker, and the Rise of the New Republican Party (Penguin Press, 2020) , offers historical context for the current crisis and the upcoming election.