Gavin Newsom’s redistricting campaign is supercharging his roster of grassroots donors, creating a powerful springboard for his likely 2028 presidential campaign. The California governor brought in more than 100,000 new-to-Newsom contributors — people who had not given to his previous statewide campaigns or federal committee — as part of his blockbuster fundraising for Proposition 50, which would redraw the state’s congressional lines to favor Democrats. The new donors represent more than 93 percent of individuals funding Newsom’s committee backing the initiative, according to a POLITICO analysis.