Which Roman statesman attacked Mark Antony in a series of speeches called the Philippics?

Marcus Tullius Cicero (3 January 106 – 7 December 43 BC) was a Roman statesman, lawyer, scholar, philosopher and Academic Skeptic, who tried to uphold optimate principles during the political crises that led to the establishment of the Roman Empire. His extensive writings include treatises on rhetoric, philosophy and politics, and he is considered one of Rome's greatest orators and prose stylists.

Cicero and Mark Antony became the two leading men in Rome: Cicero as spokesman for the Senate; Antony as consul, leader of the Caesarian faction, and unofficial executor of Julius Caesar's public will. Relations between the two were never friendly and worsened after Cicero claimed that Antony was taking liberties in interpreting Caesar's wishes and intentions.

Octavian was Caesar's adopted son and heir. After he returned to Italy, Cicero began to play him against Antony. He praised Octavian, declaring he would not make the same mistakes as his father. He attacked Antony in a series of speeches he called the Philippics, after Demosthenes's denunciations of Philip II of Macedon. At the time Cicero's popularity as a public figure was unrivalled.