Does a defendant have a right to present his defense in a civil case?

We reject defendant's contention he was denied his right to present his defense. Generally, the exclusion of evidence "on a minor or subsidiary point does not interfere with that constitutional right." (People v. Cunningham (2001) 25 Cal.4th 926, 999.) Moreover, the record shows that defendant had ample ability and opportunity to present copious evidence, including his own testimony and that of experts, on his defense that he accidentally mistook his handgun for his taser.