Yahm Levin is a diehard Democrat who lives in one of the nation's most liberal cities. And yet the 39-year-old Jewish woman from Los Angeles is sometimes afraid to use her first or last name when meeting people — even those who share her progressive politics. Levin has learned from recent experience that being identified as a Jew, especially one who lived in Israel, can trigger uncomfortable questions from fellow Democrats. Or worse. So, she introduces herself by her middle name, Shelly, which she said feels safer.