Prosecutor Shannon Faherty said Steven Brooks' attorney didn't appear Friday in San Bernardino County Superior Court in Victorville, Calif., due to heavy rains the area.
Brooks' lawyer, Sean O'Connor, didn't immediately respond to messages.
Faherty says the pretrial hearing was rescheduled March 21.
Trial is scheduled April 7.
Brooks is being held in San Bernardino on $100,000 bail. He pleaded not guilty in August to felony evasion and obstruction charges, and misdemeanor harming a police animal.
The former North Las Vegas Democrat was expelled from the Legislature March 28 as a security threat.