Endorsements, a hefty war chest and an effective absentee ballot program appear to have put California Board of Equalization Vice Chairwoman Judy Chu (D) in position to succeed former Rep.-turned-Labor Secretary Hilda Solis (D-Calif.). But there are several factors that could throw a roadblock into the heavily favored Chu’s path: the large candidate field; the fact that another candidate with the same last name appears next to her on the ballot; expected low voter turnout; and virtually no public polling conducted in the race. Tuesday’s special election in the heavily Democratic East Los Angeles district will be a blanket primary,...