 Democrats have seven weeks before they meet in Chicago to officially nominate their candidate for the 2024 election. Would Biden possibly step aside to make room for a Kamala Harris, a Gretchen Whitmer, a Gavin Newsom or someone else? If that happened, what exactly would the party need to do to anoint a new nominee? And are there any historical precedents that suggest how this might play out? Jeffrey Engel is here to offer some context. He is director of the Center for Presidential History at Southern Methodist University. Jeffrey, welcome back to Think.