Cal. ELEC § 20502

(a) In any action for libel or slander brought by a candidate, the willingness or unwillingness of the defendant to retract or correct a communication made in the course of a campaign, and his or her action in doing so, shall be admissible in evidence in the exemplary damages phase of a bifurcated trial. (b) The remedy provided by this section is in addition to any other remedy provided by law.