Residents of the 10th Congressional District have a rare chance next month to select a new representative. The district has been without a vote in the Capitol since June 26, when former Democratic Rep. Ellen Tauscher resigned to take a post as undersecretary for Arms Control and International Security with the U.S. State Department. Voters faced with this big decision have their work cut out for them. Drawn by the infrequent opportunity to run for an open Congressional seat, 14 candidates will compete in the Sept. 1 special primary election for either an outright win or a spot as their...