clinton brought in katy perry and her husband former president bill clinton joined her for the first time on the campaign time. >> you've got a lot of talk about breaking the glass ceiling. i want to talk about one barrier that has not been broken. i want you to support hillary for me, too, because i want to break a ceiling. i am tired of the stranglehold that women have had on the job of presidential spouse. senator bernie sanders to the chants of "feel the burn" on the sidelines. none of it compared to this moment in 2007 when another marching band led then candidate barack obama his wife michelle and 4,000 supporters to that year's jefferson jackson dinner.