Neighbors for a Better San Francisco, a new PAC, is flooding San Francisco with millions of dollars in political spending in hopes of defeating progressive candidates for the city’s Board of Supervisors along with select ballot measures. Besides targeting left-leaning candidates, the organization also opposes Proposition I, a real estate transfer tax strongly resisted by the city’s real estate interests, and California Proposition 15, a tax to fund public schools.

Dean Preston is a key target of all this money. Having won last year’s election to fill London Breed’s District 5 seat after Breed vacated it to serve as San Francisco mayor, he’s the district’s incumbent on the eleven-person Board of Supervisors and a longtime tenant organizer and advocate for the homeless. Preston, who wrote Proposition I, spearheaded an effort to make the city’s ban on COVID-19 evictions permanent, and used private funds to house the homeless when he felt the city was moving too slowly to find such housing during the pandemic, was recently the target of an ad that accuses him of protecting “Jim Crow–era housing policies.” At a fundraiser for Preston earlier this week, Rep. Pramila Jayapal defended him against what she called “these big money attacks on his campaign,” describing Preston as “a fighter for things that matter to working-class people.”

It’s no surprise that big money is attacking Preston. The PAC’s list of donors reads like a who’s who of the area’s ruling class.