Twenty minutes after Barack Obama’s speech was set to begin, his campaign appears not ready for prime time, or even morning drive. Technicians have decided to reconfigure the microphones, so there is much wire-wrangling going on around flag-bedecked stage from which Obama will speak. At the entrance to the auditorium here at the Constitution Center, there is a huge backup of guests and press, waiting to get in. Staffers didn’t know how to get the job done in an orderly way — “The list isn’t in alphabetical order,” someone said as I waited in the crush — and there’s still much dallying as the minutes go by.