San Francisco voters will decide today whether to recall three progressive school board members, a proposal that has drawn support from across the political spectrum, but that also has driven a wedge between Democrats in the overwhelmingly liberal city.

The year-long effort to recall President Gabriela López, Vice President Faauuga Moliga, and board member Alison Collins is being supported by a coalition that includes powerful Democrats like Mayor London Breed. The race, which has drawn about $2 million in donations, has also piqued the interest of some wealthy conservative donors, including David Sacks, the founding chief operational officer of PayPal, who …