"Put everything on the table. Answer every question," McCain advised Christie during an interview on MSNBC.
"If it's a three-hour press conference, answer every question. Answer every question, every comment. And then move on. The last thing you need is one of these things to be dragged out. I can say that from personal experience, my friend."
Christie is scheduled to address the scandal on camera for the first time at 11 a.m. ET on Thursday.