None of the injuries are believed to be life threatening. A driver hit other vehicles and then ran through a Endymion parade crowd, police said.
Perez was elected Saturday as the new DNC chair, tasked with rebuilding the factionalized party after the November election.
Issa said that Attorney General Jeff Sessions, who supported Trump and is an appointee, is too close to the president to lead an investigation.
Malaysia's health minister also said Sunday that autopsy results suggested a nerve agent caused "very serious paralysis" that killed Kim Jong Nam.
The boxing legend's son was detained for about two hours on arrival at a Florida airport and questioned about his religion, his lawyer says.