According to Fox
At one point last night the police formed a corridor for the protection of the delegates Walking through this gauntlet gave them protection to go to transportation and hotels.
Most probably left to take advantage of this security.
2 hours 39 min ago
MEDIA MATTERS STAFF
COREY LEWANDOWSKI: Someone at the senior levels of this campaign has reviewed what Melania Trump was going to say and signed off on that. Now whether they're held responsible, because the buck stops at the top, or the person who actually put those words to paper is held responsible, I think it's shameful that Melania Trump, who is such a great person, who represents her husband and would represent this country amazingly as a first lady is under this controversy because the staff didn't do her well.
More in the article at MediaMatters.