When caesar augustus came to power, this form of government disappeared from rome.

When Caesar Augustus came to power in Rome, the Republic came to an end. The Roman Republic was a worn-out institution, where civil wars and dictatorships had worn away the power and credibility of the Senate. Governance was impossible. When Caesar Octavianus (his original name), who had already been part of an earlier dictatorship called the Second Triumvirate, assumed as Consul, the Senate (pressured by Roman society, which esteemed him from his dictatorial era) granted him the sum of public power and the title of Augustus. In this way, the transition of the Republic to the Roman Empire occurred, being Caesar Augustus the first Roman emperor.

uncle sam would be tossing and turning in his grave : *)