LOS ANGELES (AP) — A late-hour attempt by California’s top Democratic official to thin out the party’s crowded field for governor emphatically flopped, leaving the contest virtually unchanged and Democrats vexed over the possibility of a Republican upset in November. Outgoing Democratic Gov. Gavin Newsom has acknowledged fears inside the party that multiple Democratic candidates could undercut each other in the June 2 primary election, opening a pathway for a Republican to seize the top job in