SAN FRANCISCO -- The state Supreme Court allowed California on Wednesday to go ahead with a voter-approved overhaul of primary elections, putting all candidates on the same ballot in the first round and matching the top two vote-getters, regardless of party, in the runoff. The justices unanimously denied a request to block the measure, Proposition 14, which takes effect in January.Prop. 14, which passed with a 54 percent majority in June, eliminates party primaries and instead requires all state and federal candidates, except those for president, to run in a single primary for each office. The top two finishers, who...