 Ateius Capito worked with his fellow tribune Publius Aquillius Gallus in opposition to Crassus and Pompeius Magnus during their second joint consulship in 55 BC.In particular, the two tribunes supported Cato in attempting to block the "Lex Trebonia", legislation brought by C. Trebonius to give Crassus and Pompeius each an extended five-year proconsular province.Their objections at the assembly, though strenuous, were unsuccessful