Today, Doug Sovern, KCBS political reporter and host of “The State, Of California,” joined KCBS Radio's Patti Reising and Bret Burkhart from the Merchant Exchange building in downtown San Francisco—the site of tonight’s debate in the San Francisco Mayor’s race.

Four major candidates trying to unseat Mayor London Breed will face off in that showdown tonight, which you can see live on KPIX Channel 5 at 6:00.