 Our correspondent, Cathy Kay, looks at the process of how the Democratic Party will confirm its new nominee. The process is messy because we haven't been here before. So we know that there's going to be that August convention. And that is when the nominee is formally announced, if you like. All of the delegates cast their votes for that nominee. And there's a voting process. Now, if it's an open convention, and this is one thing I'm still hearing is possible, although more names aren't putting themselves forward.