 Complete the following phrase:  Although Marcus Licinius Crassus did not play a prominent part in Roman politics apart from his consulship in 70 BC, prior to being part of the First Triumvirate he was known as a supporter of the Populares. Pompey was also a member of the First Triumvirate. The Optimates in the Senate side-lined him and frustrated his attempts to have his settlements in the east after his victory in the 