Oratory

World of Darkness - Rulebook
Sometimes your character is called on to convince a crowd of people to accept his assertions, calling for a rousing, compelling speech. This is a contested action. Roll Presence + Persuasion + equipment versus the highest Resolve + Composure present in the audience. If the orator wins, he convinces the crowd. If he fails, one or two people believe, but the group on the whole is unconvinced. A tie indicates that the group is willing to listen, but remains unconvinced. In the case of a failed or tied effort, your character can make a successive attempt (see p. 132) if the Storyteller agrees that the crowd is willing to listen.
Note that oratory conducted to convince a crowd to do what your character wants is different from a performance. The former is based on Persuasion, because your character tries to sway listeners, while the latter is based on Expression, because your character simply seeks to entertain or inform an audience.
Roll Results
Dramatic Failure: Not only does your character fail to persuade the crowd, his clumsy effort turns the mob against him. No successive attempts are allowed and the crowd could try to physically silence him.
Failure: Your character has no success in getting the crowd to listen to him.
Success: Your character's speech convinces the crowd to accept his assertions.
Exceptional Success: Your character has the crowd eating out of his hand. They accept whatever he says.
Suggested Equipment: Intimidating uniform or expensive suit (+1), megaphone (+1), professional sound and video system (+2), state-of-the-art media suite (+3)
Possible Penalties: Audience distracted (-1), audience aggressive (-3), unimpressive or inappropriate appearance (-1 to -3), laryngitis (-5)
Dice Pool: Presence + Persuasion + equipment versus highest Resolve + Composure of audience
Action: Contested