Most senators opposed this because they were envious, particularly Lucius Licinius Lucullus who had been replaced in the command of this war by Pompey. Crassus had co-operated with Lucullus in this matter. An aggrieved Pompey 'made friends with Caesar and promised under oath to support him for the consulship'.
They liked a different military leader, which they considered stronger and more popular. They liked having an election for a new leader, because they thought that Caesar was dangerous.