At least 54 of the California governor’s past top donors haven’t chipped in for the Prop 50 campaign, including some of the state’s wealthiest residents and industry titans.But big-dollar donors carry weight in presidential campaigns, too, and some view these withdrawals as a warning sign for Newsom — reflecting lingering frustration with the party’s sweeping losses in 2024, fear of retribution from Trump or hesitation, even among some of California’s heaviest hitters, to align themselves this early with Newsom.“I have been really shocked at the big names that have not been on, which make me feel like this thing is...