About the same time he married Calpurnia, the daughter of Lucius Piso, who was to succeed him in the consulship, and gave his own daughter Julia to Cneius Pompey; rejecting Servilius Caepio, to whom she had been contracted, and by whose means chiefly he had but a little before baffled Bibulus. After this new alliance, he began, upon any debates in the senate, to ask Pompey's opinion first, whereas he used before to give that distinction to Marcus Crassus; and it was the usual practice for the consul to observe throughout the year the method of consulting the senate which he had adopted on the calends (the first) of January.