sentences:  LaMalfa was a co-author of ACA 20, which, similar to Arizona's new law, would empower law enforcement to act as Immigration, Customs Enforcement Agents and would have cracked down on illegal immigration.ACA 20 failed to pass the first hearing by a 3-to-6 vote.In 2007, he successfully passed AB 1645, a law that would prevent seizures of firearms in the event of an emergency or natural disaster.