For media outlets breathlessly selling the story about how Bill Clinton would play the first lady role should his wife, Sen. Hillary Rodham Clinton, become president, well, just hang on a minute. We hear from key Clintonistas that there's an alternative to having Bubba around all the time, stealing the limelight. It's having Chelsea Clinton, the all-grown-up daughter, take over the East Wing. The scenario: Chelsea would move to the White House to handle social functions because the former president would be too busy with his surrogate work for his wife and his ongoing efforts for his foundation, which he'd...