Before heading to a more pristine setting in Atherton, Barack Obama was in the Mission today at the Women's Building, stumping for votes before California's Feb. 5 primary. Over plastic cups of water, he met with four Dr. Laura-unapproved single mothers--two of them staunch Obama supporters, two "on the fence"--and we're loving the one on the left, school teacher Kara Daillak, 38. (Ditch the kid, and let's go get smashed in 'loin tonight.)...