Final answer:
Marc Antony roused support for Caesar and turned public opinion against the conspirators with a famous speech, following Caesar's assassination.
Step-by-step explanation:
When the senate wants to oust Julius Caesar, it is Marc Antony who rouses support for him. After Caesar's assassination, Antony gave a famous speech which helped to turn public opinion against the conspirators. Antony was a loyal supporter of Caesar and a member of the Second Triumvirate, along with Octavian and Lepidus, which was established to share dictatorial powers in Rome.