'People ask the difference between a leader and a boss.  The leader works in the open, and the boss in covert.  The leader leads, and the boss drives." -- Theodore Roosevelt -- I would love to give Mayor Kevin Johnson the benefit of the doubt and call him a leader. But as time goes by, I see less of a leader and more of a driver. Heck, with lessons, anyone can drive. With a GPS navigation system of special assistants, a campaign manager, volunteers and a spokesperson it certainly may appear the mayor is leading the way. But even with GPS and a car full of backseat drivers, people have gotten lost. A GPS navigation system can't prepare Johnson for traffic conditions, debris left in city