joining us from virginia is caitlin jewitt from -- a political science professor at virginia tech and the author of the book "the primary rules: parties, voters and presidential nominations." let us begin with the situation we are in the democratic party. president biden dropped his reelection bid, and it would appear that his vice president, kamala harris, is the presumptive nominee. are there federal rules in place by the party to deal with this situation? guest: there are. there are party rules in place, though the nomination process is harvard -- governed by parties and private organizations. there is no federal or state law or constitutional mandate that dictates how this will unfold. it is up to the democratic party. host: what rules do they have in place? guest: the democratic national committee's rules committee helped hammer this out because this is an unusual and unprecedented situation. beginning in about an hour the delegates to the national convention will do an online and virtual vote for the nominee. and vice president harris is the only candidate to qualify for that ba