Trump vs Harris is just a front - UnHerd
Until the Seventies, conventions continued to play a central role in bringing party groups together. Delegates were considered ambassadors from around the country, representing both local political machines and rural courthouse gangs. To secure the nomination, the winning candidate had to make concessions to these various party factions, even if it meant choosing a running mate from a different wing of the party.
All of this, however, is now ancient history, in no small part thanks to two structural changes: the rise of party primaries and the deregulation of campaign finance.