After San Francisco Mayor Gavin Newsom announced that he was withdrawing from running for governor of California, he disappeared without some of his staff knowing his whereabouts (maybe Newsom was hiking the Appalachian Trail?). In reality, Newsom jetted off to Hawaii to join his wife and baby who was already on vacation. In an unsigned letter, Newsom designated Supervisor Carmen Chu as acting mayor. Legally, if the mayor of San Francisco is not available, the Board of Supervisors President, which would be David Chiu, would be acting mayor. In either case, congrats to David or Carmen for becoming the first ever (I believe) Asian American acting mayor of San Francisco!
(EDITORS NOTE: Mabel Teng was acting mayor of San Francisco in 1995. Thanks to Jim at SFCitizen for the hat tip.)