Despite a mere hiccup in electoral support, San Francisco mayor Gavin Newsom may be enduring just the beginning of fallout from his affair with the wife of his campaign manager, Alex Tourk. Word around the Valley is that angel investor Ron Conway is cutting his ties with Newsom, making it clear that his loyalties lie with Tourk (Conway's wife Gayle is said to be particularly unamused by Newsom's antics). Further, Sequoia super-VC Mike Moritz has canceled a Newsom fundraiser, though it's unclear if it was to be a campaign event or something for Newsom's charity, SF Connect. The Mayoral Abandonment Watch is on. If you hear of anyone else heading for the lifeboats, let us know.