This bold gambit sent conservatives in the Senate through the roof. By every right of custom the Senate enjoyed full discretion over both state finances and foreign policy. Polybius, a close student of the Republican constitution, said the Senate “has the control of the treasury, all revenue and expenditure being regulated by it,” and “it also occupies itself with the dispatch of all embassies sent to countries outside of Italy for the purpose… of settling differences.” The people, he said, “have nothing to do with it.” By laying claim to Pergamum, Tiberius was attempting to wrestle both away
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