With their registrations sinking and their political clout withering, California Republicans have come out of the November election in danger of slipping into political irrelevance across much of the state. "There's been a broad repudiation of traditional conservative Republicans in California," said Tony Quinn, a former GOP analyst and co-editor of the California Target Book, which focuses on political contests in the state. "There are almost no areas in the state that can be considered safely Republican anymore." Since 2004, Republican registration has dropped by more than 317,000 in the state, while Democrats have picked up 563,000 new voters. Five...