Smear Campaigns are nothing new. Apparently, Mark Antony and Caesar Augustus (AKA Octavian) quickly took advantages when they could.
An example of Antony slander:
Octavius was studying and undergoing military training in Apollonia, Illyria, when Julius Caesar was killed on the Ides of March (15 March) 44 BC. He rejected the advice of some army officers to take refuge with the troops in Macedonia and sailed to Italy to ascertain whether he had any potential political fortunes or security. Caesar had no living legitimate children under Roman law,[nb 2] and so had adopted Octavius, his grand-nephew, making him his primary heir. Mark Antony later charged that Octavian had earned his adoption by Caesar through sexual favours, though Suetonius describes Antony’s accusation as political slander. This form of slander was popular during this time in the Roman Republic to demean and discredit political opponents by accusing them of having an inappropriate sexual affair. After landing at Lupiae near Brundisium, Octavius learned the contents of Caesar’s will, and only then did he decide to become Caesar’s political heir as well as heir to two-thirds of his estate.[
An example of Octavian tarnishing Antony’s image:
Meanwhile, Antony’s campaign turned disastrous against Parthia, tarnishing his image as a leader, and the mere 2,000 legionaries sent by Octavian to Antony were hardly enough to replenish his forces. On the other hand, Cleopatra could restore his army to full strength; he already was engaged in a romantic affair with her, so he decided to send Octavia back to Rome. Octavian used this to spread propaganda implying that Antony was becoming less than Roman because he rejected a legitimate Roman spouse for an “Oriental paramour“. In 36 BC, Octavian used a political ploy to make himself look less autocratic and Antony more the villain by proclaiming that the civil wars were coming to an end, and that he would step down as triumvir—if only Antony would do the same. Antony refused
Politics, those fighting for power, have been doing this through the centuries.