Tesla registrations fell in California.Newsday LLC/Getty ImagesTesla's new car registrations in California dropped 24% in the second quarter.Governor Gavin Newsom said Tesla is finally starting to see competition from other companies in California.Tesla's troubles in California could be a symptom of a larger issue, experts say.Tesla has a California problem — its residents aren't buying as many of Elon Musk's electric cars as they used to.Tesla's new car registrations in the Golden State dropped for the third straight quarter, with a 24% fall between April and June, according to the California New Car Dealers Association.And California isn't the only place where Tesla's chokehold on the EV market is beginning to slip.