Democrat Barbara Boxer's quest for a fourth term in the U.S. Senate may give Californians a chance to pass judgment on Washington in the Obama era: Do voters approve of the early performance of the Democratic president and Congress? Or is it time to restore more power to Republicans, in this case to a controversial former Silicon Valley CEO making her first run for elective office? What looks increasingly likely is that Boxer will be in for the re-election fight of her career. While she has yet to announce her candidacy, all signs point to a run by Republican Carly...